{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/2.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c \u01b0\u1edbc c\u1ee7a -6 l\u00e0:","select":["A. {-6; -3; -2; -1; 1; 2; 3; 6}","B. {-6; -3; -1; 1; 3}","C. { -3; -1; 1; 3}","D. {-6; -3; 3; 6}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u01af(-6) = {-6; -3; -2; -1; 1; 2; 3; 6}<br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. {-6; -3; -2; -1; 1; 2; 3; 6}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1281},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/4.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c \u01b0\u1edbc c\u1ee7a 4 l\u00e0:","select":["A. {-2; -1; 1; 2}","B. {-4; -2; -1; 1; 2}","C. {-4; -2; -1; 1; 2; 4}","D. {-2; -1; 1; 2; 4}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u01af(4) = {-4; -2; -1; 1; 2; 4}<br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. {-4; -2; -1; 1; 2; 4}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1282},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/5.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c \u01b0\u1edbc c\u1ee7a 8 l\u00e0:","select":["A. { -4; -2; -1; 1; 2; 4; 8}","B. {-8; -4; -2; -1; 1; 2; 4; 8}","C. {-4; -2; -1; 1; 2; 4}","D. {-2; -1; 1; 2; 4}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>\u01af(8) = {-8; -4; -2; -1; 1; 2; 4; 8}<br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. {-8; -4; -2; -1; 1; 2; 4; 8}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1283},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/2.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9i c\u1ee7a 5 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 20 l\u00e0:","select":["A. {...; -20; -15; -10; -5; 0; 5; 10; 15; 20; ...}","B. {-15; -10; -5; 0; 5; 10; 15}","C. {-15; -10; -5; 0; 5; 10; 15; 20; ...}","D. {-20; -15; -10; -5; 0; 5; 10; 15; 20}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi x l\u00e0 b\u1ed9i c\u1ee7a 5 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 20<br\/>$\\Rightarrow$ x $\\in$ B(5) v\u00e0 |x| < 20<br\/>B(5) = {...; -20; -15; -10; -5; 0; 5; 10; 15; 20; ...}<br\/>$\\Rightarrow$ x $\\in$ {...; -20; -15; -10; -5; 0; 5; 10; 15; 20; ...}<br\/>M\u00e0 |x| < 20<br\/> $\\Rightarrow$ x $\\in$ {-15; -10; -5; 0; 5; 10; 15} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. {-15; -10; -5; 0; 5; 10; 15}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1284},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/6.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9i c\u1ee7a 3 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 15 l\u00e0:","select":["A. { -12; -9; -6; -3; 0; 3; 6; 9; 12}","B. {-15; -12; -9; -6; -3; 0; 3; 6; 9; 12; 15}","C. {-18; -15; -12; -9; -6; -3; 0; 3; 6; 9; 12; 15; 18}","D. {...; -18; -15; -12; -9; -6; -3; 0; 3; 6; 9; 12; 15; 18; ...}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi x l\u00e0 b\u1ed9i c\u1ee7a 3 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 15<br\/>$\\Rightarrow$ x $\\in$ B(3) v\u00e0 |x| < 15 <br\/>B(3) = {...; -18; -15; -12; -9; -6; -3; 0; 3; 6; 9; 12; 15; 18; ...}<br\/>$\\Rightarrow$ x $\\in$ {...; -18; -15; -12; -9; -6; -3; 0; 3; 6; 9; 12; 15; 18; ...}<br\/>M\u00e0 |x| < 15<br\/> $\\Rightarrow$ x $\\in$ { -12; -9; -6; -3; 0; 3; 6; 9; 12} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. { -12; -9; -6; -3; 0; 3; 6; 9; 12}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1285},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank_random","correct":[[["-3"],["-5"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<table><tr><th>a<\/th><th>-24<\/th><th>115<\/th><\/tr><tr><td>b<\/td><td>8<\/td><td>-23<\/td><\/tr><tr><td>a : b<\/td><td>_input_<\/td><td>_input_<\/td><\/tr><\/table>","hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3:<br\/><table><tr><th>a<\/th><th>-24<\/th><th>115<\/th><\/tr><tr><td>b<\/td><td>8<\/td><td>-23<\/td><\/tr><tr><td>a : b<\/td><td>-3<\/td><td>-5<\/td><\/tr><\/table><br\/>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t t\u1eeb tr\u00e1i qua ph\u1ea3i l\u00e0: <span class='basic_pink'> -3; -5<\/span><\/span> <br\/> "}]}],"id_ques":1286},{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank_random","correct":[[["12"],["24"]]],"list":[{"point":5,"width":60,"content":"","type_input":"","ques":"<table><tr><th>a<\/th><th>216<\/th><th>-312<\/th><\/tr><tr><td>b<\/td><td>18<\/td><td>-13<\/td><\/tr><tr><td>a : b<\/td><td>_input_<\/td><td>_input_<\/td><\/tr><\/table>","hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/><table><tr><th>a<\/th><th>216<\/th><th>-312<\/th><\/tr><tr><td>b<\/td><td>18<\/td><td>-13<\/td><\/tr><tr><td>a : b<\/td><td>12<\/td><td>24<\/td><\/tr><\/table><br\/>V\u1eady c\u00e1c s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t t\u1eeb tr\u00e1i qua ph\u1ea3i l\u00e0: <span class='basic_pink'> 12; 24<\/span><\/span> <br\/> "}]}],"id_ques":1287},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c: A = 18 - 10 : 2 - 7","select":["A = 6","A = -6","A = 7","A = -7"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> Bi\u1ec3u th\u1ee9c c\u00f3 ch\u1ee9a ph\u00e9p t\u00ednh c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia th\u00ec ta th\u1ef1c hi\u1ec7n t\u00ednh ph\u00e9p nh\u00e2n, chia tr\u01b0\u1edbc v\u00e0 th\u1ef1c hi\u1ec7n t\u00ednh ph\u00e9p c\u1ed9ng, tr\u1eeb sau.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*}A&= 18 - 10 : 2 - 7 \\\\&= 18 - 5 - 7\\\\&= 13 - 7\\\\&= 6\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A = 6<\/span><\/span> <br\/>","column":2}]}],"id_ques":1288},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c: A = 72 : [(-6) . (-2) - 4]","select":["A = 8","A = -8","A = 9","A = -9"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> + Ta b\u1ecf d\u1ea5u ngo\u1eb7c theo th\u1ee9 t\u1ef1: ( ) $\\rightarrow$ [] $\\rightarrow$ {} <br\/>+ Bi\u1ec3u th\u1ee9c c\u00f3 ch\u1ee9a ph\u00e9p t\u00ednh c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia th\u00ec ta th\u1ef1c hi\u1ec7n t\u00ednh ph\u00e9p nh\u00e2n, chia tr\u01b0\u1edbc v\u00e0 th\u1ef1c hi\u1ec7n t\u00ednh ph\u00e9p c\u1ed9ng, tr\u1eeb sau.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> $\\begin{align*}A&= 72 : [(-6) . (-2) - 4] \\\\&= 72 : (12 - 4)\\\\&= 72 : 8\\\\&= 9\\end{align*}$<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A = 9<\/span><\/span> <br\/>","column":2}]}],"id_ques":1289},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft: <br\/>8 $\\vdots$ x v\u00e0 x > 0","select":["A. x $\\in$ {-8; -4; -2; -1; 1; 2; 4; 8}","B. x $\\in$ {-4; -2; -1; 1; 2; 4}","C. x $\\in$ { 1; 2; 4; 8}","D. x $\\in$ {-8; -4; -2; -1}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>8 $\\vdots$ x $\\Rightarrow$ x $\\in$ \u01af(8)<br\/>+ B\u01b0\u1edbc 1: T\u00ecm \u01af(8)<br\/>+ B\u01b0\u1edbc 2: T\u00ecm c\u00e1c gi\u00e1 tr\u1ecb l\u00e0 \u01b0\u1edbc c\u1ee7a 8 l\u1edbn h\u01a1n 0<\/span> <br\/><br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> 8 $\\vdots$ x<br\/>$\\Rightarrow$ x $\\in$ \u01af(8) <br\/> \u01af(8) = {-8; -4; -2; -1; 1; 2; 4; 8}<br\/>$\\Rightarrow$ x $\\in$ {-8; -4; -2; -1; 1; 2; 4; 8}<br\/>M\u00e0 x > 0<br\/> $\\Rightarrow$ x $\\in$ { 1; 2; 4; 8} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. x $\\in$ { 1; 2; 4; 8}<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1290},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft: <br\/>6 $\\vdots$ x v\u00e0 x < 0","select":["A. x $\\in$ {-6; -3; -2; -1; 1; 2; 3; 6}","B. x $\\in$ {-6; -3; -2; -1} ","C. x $\\in$ {-6; -3; -1} ","D. x $\\in$ {-6; -3; -2}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>6 $\\vdots$ x $\\Rightarrow$ x $\\in$ \u01af(6)<br\/>+ B\u01b0\u1edbc 1: T\u00ecm \u01af(6)<br\/>+ B\u01b0\u1edbc 2: T\u00ecm c\u00e1c gi\u00e1 tr\u1ecb l\u00e0 \u01b0\u1edbc c\u1ee7a 6 nh\u1ecf h\u01a1n 0<\/span> <br\/><br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> 6 $\\vdots$ x<br\/>$\\Rightarrow$ x $\\in$ \u01af(6) <br\/> \u01af(6) = {-6; -3; -2; -1; 1; 2; 3; 6}<br\/>$\\Rightarrow$ x $\\in$ {-6; -3; -2; -1; 1; 2; 3; 6}<br\/>M\u00e0 x < 0<br\/> $\\Rightarrow$ x $\\in$ {-6; -3; -2; -1} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. x $\\in$ {-6; -3; -2; -1} <\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1291},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft: <br\/>x $\\vdots$ 4 v\u00e0 |x| < 12","select":["A. x $\\in$ {-12; -8; -4; 0; 4; 8; 12}","B. x $\\in$ {-8; -4; 0; 4; 8}","C. x $\\in$ {0; 4; 8}","D. x $\\in$ {-8; -4; 0}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>x $\\vdots$ 4 $\\Rightarrow$ x $\\in$ B(4)<br\/>+ B\u01b0\u1edbc 1: T\u00ecm B(4)<br\/>+ B\u01b0\u1edbc 2: T\u00ecm c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a x sao cho |x| < 12<\/span> <br\/><br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> x $\\vdots$ 4<br\/>$\\Rightarrow$ x $\\in$ B(4) <br\/> B(4)$\\in$ {...; -12; -8; -4; 0; 4; 8; 12; ...}<br\/>$\\Rightarrow$ x $\\in$ {...; -12; -8; -4; 0; 4; 8; 12; ...}<br\/>M\u00e0 |x| < 12<br\/> $\\Rightarrow$ x $\\in$ {-8; -4; 0; 4; 8} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. x $\\in$ {-8; -4; 0; 4; 8} <\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1292},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft: <br\/>x $\\vdots$ 7 v\u00e0 |x| < 15","select":["A. x $\\in$ {-21; -14; -7; 0; 7; 14; 21}","B. x $\\in$ {-21; -14; -7; 0; 7; 14} ","C. x $\\in$ {-14; -7; 0; 7; 14; 21}","D. x $\\in$ {-14; -7; 0; 7; 14}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>x $\\vdots$ 7 $\\Rightarrow$ x $\\in$ B(7)<br\/>+ B\u01b0\u1edbc 1: T\u00ecm B(7)<br\/>+ B\u01b0\u1edbc 2: T\u00ecm c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a x sao cho |x| < 15<\/span> <br\/><br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> x $\\vdots$ 7<br\/>$\\Rightarrow$ x $\\in$ B(7) <br\/> B(7)$\\in$ {...; -21; -14; -7; 0; 7; 14; 21; ...}<br\/>$\\Rightarrow$ x $\\in$ {...; -21; -14; -7; 0; 7; 14; 21; ...}<br\/>M\u00e0 |x| < 15<br\/> $\\Rightarrow$ x $\\in$ {-14; -7; 0; 7; 14} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> D. x $\\in$ {-14; -7; 0; 7; 14} <\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1293},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/4.jpg' \/><\/center>T\u00ecm a, bi\u1ebft: a + 2 l\u00e0 \u01b0\u1edbc c\u1ee7a 7","select":["A. a $\\in$ {-9; -3; -1; -5}","B. a $\\in$ {-9; -3; -1; 5} ","C. a $\\in$ {-9; -3; 1; 5}","D. a $\\in$ {-9; -3; 3; 5}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>+ B\u01b0\u1edbc 1: T\u00ecm \u01b0\u1edbc c\u1ee7a 7<br\/>+ B\u01b0\u1edbc 2: T\u00ecm a<\/span> <br\/><br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> a + 2 l\u00e0 \u01b0\u1edbc c\u1ee7a 7<br\/>$\\Rightarrow$ (a + 2) $\\in$ \u01af(7) <br\/> \u01af(7)$\\in$ {-7; -1; 1; 7}<br\/>Ta c\u00f3 b\u1ea3ng gi\u00e1 tr\u1ecb nh\u01b0 sau:<br\/><table><tr><th>a + 2<\/th><th>-7<\/th><th>-1<\/th><th>1<\/th><th>7<\/th><\/tr><tr><td>a<\/td><td>-9<\/td><td>-3<\/td><td>-1<\/td><td>5<\/td><\/tr><\/table> <br\/> $\\Rightarrow$ a $\\in$ {-9; -3; -1; 5}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. a $\\in$ {-9; -3; -1; 5}<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1294},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/2.jpg' \/><\/center>T\u00ecm a, bi\u1ebft: a - 3 l\u00e0 \u01b0\u1edbc c\u1ee7a 4","select":["A. a $\\in$ {-4; -2; -1; 1; 2; 4}","B. a $\\in$ {-7; 1; 2; 4; 5; 7} ","C. a $\\in$ {-1; -5; 2; 4; 5; 7}","D. a $\\in$ {-1; 1; 2; 4; 5; 7}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>+ B\u01b0\u1edbc 1: T\u00ecm \u01b0\u1edbc c\u1ee7a 4<br\/>+ B\u01b0\u1edbc 2: T\u00ecm a<\/span> <br\/><br\/><span class='basic_left'><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> a - 3 l\u00e0 \u01b0\u1edbc c\u1ee7a 4<br\/>$\\Rightarrow$ (a - 3) $\\in$ \u01af(4) <br\/> \u01af(4)$\\in$ {-4; -2; -1; 1; 2; 4}<br\/>Ta c\u00f3 b\u1ea3ng gi\u00e1 tr\u1ecb nh\u01b0 sau:<br\/><table><tr><th>a - 3<\/th><th>-4<\/th><th>-2<\/th><th>-1<\/th><th>1<\/th><th>2<\/th><th>4<\/th><\/tr><tr><td>a<\/td><td>-1<\/td><td>1<\/td><td>2<\/td><td>4<\/td><td>5<\/td><td>7<\/td><\/tr><\/table> <br\/> $\\Rightarrow$ a $\\in$ {-1; 1; 2; 4; 5; 7}<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> D. a $\\in$ {-1; 1; 2; 4; 5; 7}<\/span><\/span> <br\/><\/span>","column":2}]}],"id_ques":1295},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/2.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9i c\u1ee7a -6 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 18 l\u00e0:","select":["A. {-18; -12; -6; 0; 6; 12; 18}","B. {-18; -12; -6; 6; 12; 18}","C. {-12; -6; 0; 6; 12}","D. {-12; -6; 6; 12}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi x l\u00e0 b\u1ed9i c\u1ee7a -6 c\u00f3 gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 18<br\/>$\\Rightarrow$ x $\\in$ B(-6) v\u00e0 |x| < 18 <br\/>B(-6) = {...; -18; -12; -6; 0; 6; 12; 18; ...}<br\/>$\\Rightarrow$ x $\\in$ {...; -18; -12; -6; 0; 6; 12; 18; ...}<br\/>M\u00e0 |x| < 18<br\/> $\\Rightarrow$ x $\\in$ { -12; -6; 0; 6; 12} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> C. { -12; -6; 0; 6; 12}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1296},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft:<br\/> -12 . x = 36","select":["A. x = 3","B. x = -3 ","C. x = 3 ho\u1eb7c x = -3","D. C\u1ea3 3 \u0111\u00e1p \u00e1n tr\u00ean \u0111\u1ec1u sai"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Trong \u0111\u1eb3ng th\u1ee9c d\u1ea1ng a.x = b (a,b $\\in$ Z, a $\\ne$ 0) ta t\u00ecm x nh\u01b0 sau:<br\/>+ T\u00ecm gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a x: <b> |x| = $\\dfrac{|b|}{|a|}$<\/b><br\/>+ X\u00e1c \u0111\u1ecbnh d\u1ea5u c\u1ee7a x theo quy t\u1eafc \u0111\u1eb7t d\u1ea5u c\u1ee7a ph\u00e9p nh\u00e2n s\u1ed1 nguy\u00ean.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: |x| = $\\dfrac{36}{12}$ = 3<br\/>V\u00ec t\u00edch 36 l\u00e0 s\u1ed1 d\u01b0\u01a1ng n\u00ean x c\u00f9ng d\u1ea5u v\u1edbi -12<br\/>V\u1eady x = -3<br\/>Ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. x = -3<\/span><\/span> <br\/>","column":2}]}],"id_ques":1297},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft:<br\/> 5 . x = -40","select":["A. x = 8","B. x = -8 ","C. x = 8 ho\u1eb7c x = -8","D. C\u1ea3 3 \u0111\u00e1p \u00e1n tr\u00ean \u0111\u1ec1u sai"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Trong \u0111\u1eb3ng th\u1ee9c d\u1ea1ng a.x = b (a,b $\\in$ Z, a $\\ne$ 0) ta t\u00ecm x nh\u01b0 sau:<br\/>+ T\u00ecm gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a x: <b> |x| = $\\dfrac{|b|}{|a|}$<\/b><br\/>+ X\u00e1c \u0111\u1ecbnh d\u1ea5u c\u1ee7a x theo quy t\u1eafc \u0111\u1eb7t d\u1ea5u c\u1ee7a ph\u00e9p nh\u00e2n s\u1ed1 nguy\u00ean.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: |x| = $\\dfrac{40}{5}$ = 8<br\/>V\u00ec t\u00edch -40 l\u00e0 s\u1ed1 \u00e2m n\u00ean x kh\u00e1c d\u1ea5u v\u1edbi 5<br\/>V\u1eady x = -8<br\/>Ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> B. x = -8<\/span><\/span> <br\/>","column":2}]}],"id_ques":1298},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" T\u00ecm x, bi\u1ebft:<br\/> -6 . x = -54","select":["A. x = 9","B. x = -9 ","C. x = 9 ho\u1eb7c x = -9","D. C\u1ea3 3 \u0111\u00e1p \u00e1n tr\u00ean \u0111\u1ec1u sai"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Trong \u0111\u1eb3ng th\u1ee9c d\u1ea1ng a.x = b (a,b $\\in$ Z, a $\\ne$ 0) ta t\u00ecm x nh\u01b0 sau:<br\/>+ T\u00ecm gi\u00e1 tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a x: <b> |x| = $\\dfrac{|b|}{|a|}$<\/b><br\/>+ X\u00e1c \u0111\u1ecbnh d\u1ea5u c\u1ee7a x theo quy t\u1eafc \u0111\u1eb7t d\u1ea5u c\u1ee7a ph\u00e9p nh\u00e2n s\u1ed1 nguy\u00ean.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/>Ta c\u00f3: |x| = $\\dfrac{54}{6}$ = 9<br\/>V\u00ec t\u00edch -54 l\u00e0 s\u1ed1 \u00e2m n\u00ean x kh\u00e1c d\u1ea5u v\u1edbi -6<br\/>V\u1eady x = 9<br\/>Ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. x = 9<\/span><\/span> <br\/>","column":2}]}],"id_ques":1299},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/daiso/bai27/lv1/img\/2.jpg' \/><\/center>T\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9i c\u1ee7a -11 l\u1edbn h\u01a1n -30 v\u00e0 nh\u1ecf h\u01a1n 30 l\u00e0:","select":["A. { -22; -11; 0; 11}","B. { -11; 0; 11; 22}","C. { -22; -11; 11; 22}","D. { -22; -11; 0; 11; 22}"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>Cho a, b $\\in$ Z v\u00e0 b $\\ne $ 0. N\u1ebfu c\u00f3 s\u1ed1 nguy\u00ean q sao cho a = q.b th\u00ec ta n\u00f3i a chia h\u1ebft cho b. Ta c\u00f2n n\u00f3i a l\u00e0 b\u1ed9i c\u1ee7a b v\u00e0 b l\u00e0 \u01b0\u1edbc c\u1ee7a a.<\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/> G\u1ecdi x l\u00e0 b\u1ed9i c\u1ee7a -11 l\u1edbn h\u01a1n -30 v\u00e0 nh\u1ecf h\u01a1n 30<br\/>$\\Rightarrow$ x $\\in$ B(-11) v\u00e0 -30 < x < 30 <br\/>B(-11) = {...; -33; -22; -11; 0; 11; 22; 33; ...}<br\/>$\\Rightarrow$ x $\\in$ {...; -33; -22; -11; 0; 11; 22; 33; ...}<br\/>M\u00e0 -30 < x < 30<br\/> $\\Rightarrow$ x $\\in$ { -22; -11; 0; 11; 22} <br\/> V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> D. { -22; -11; 0; 11; 22}<\/span><\/span> <br\/>","column":2}]}],"id_ques":1300}],"lesson":{"save":0,"level":1}}