{"common":{"save":0,"post_id":"6497","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6939","mon_id":"1158767","chapter_id":"1158892","post_id":"6497","question":"<p>Cho hypebol x² – 3y² = 3. M\u1ec7nh \u0111\u1ec1 nào <strong>sai <\/strong>trong các m\u1ec7nh \u0111\u1ec1 sau:<\/p>","options":["<strong>A.<\/strong> Giá tr\u1ecb tuy\u1ec7t \u0111\u1ed1i c\u1ee7a hi\u1ec7u các kho\u1ea3ng cách t\u1eeb m\u1ed7i \u0111i\u1ec3m thu\u1ed9c hypebol \u0111\u1ebfn hai tiêu \u0111i\u1ec3m b\u1eb1ng 2<span class=\"math-tex\">$\\sqrt{3}$<\/span> .","<strong>B.<\/strong> Tiêu c\u1ef1 b\u1eb1ng 2.","<strong>C. <\/strong>Tiêu c\u1ef1 b\u1eb1ng 4.","<strong>D.<\/strong> Hai tiêu \u0111i\u1ec3m <span class=\"math-tex\">$F_1$<\/span>(–2; 0) và <span class=\"math-tex\">$F_2$<\/span>(2; 0)."],"correct":"2","level":"3","hint":"","answer":"<p>x² – 3y² = 3 ⇔ <span class=\"math-tex\">$\\dfrac{x^2}{3}-\\dfrac{y^2}{1}=1$<\/span> .<\/p><p>⇒ <span class=\"math-tex\">$\\begin{cases}a^2=3\\\\b^2=1\\\\c^2=a^2+b^2=4\\end{cases}$<\/span>⇒ <span class=\"math-tex\">$\\begin{cases}a=\\sqrt{3}\\\\b=1\\\\c=2\\end{cases}$<\/span> .<\/p><p>Tiêu c\u1ef1 2c = 2 . 2 = 4. Do \u0111ó câu <strong>B <\/strong>sai.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> Tiêu c\u1ef1 b\u1eb1ng 2.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-30 10:11:16","option_type":"math","len":0},{"id":"6941","mon_id":"1158767","chapter_id":"1158892","post_id":"6497","question":"<p>Trong các ph\u01b0\u01a1ng trình sau, ph\u01b0\u01a1ng trình nào là ph\u01b0\u01a1ng trình chính t\u1eafc c\u1ee7a hypebol?<\/p>","options":["<strong>A.<\/strong> x² – 3y² = 3","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{x^2}{\\dfrac{1}{5}} - \\dfrac{y^2}{\\dfrac{1}{2}}=1$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{x^2}{64}-\\dfrac{y^2}{16}=-1$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{x^2}{8}-\\dfrac{y^2}{4}=-1$<\/span>"],"correct":"1","level":"3","hint":"","answer":"<p>x² – 3y² = 3 ⇔ <span class=\"math-tex\">$\\dfrac{x^2}{3}-\\dfrac{y^2}{1}=1$<\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>A.<\/strong> x² – 3y² = 3.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-30 10:17:09","option_type":"math","len":0},{"id":"6942","mon_id":"1158767","chapter_id":"1158892","post_id":"6497","question":"<p>D\u1ea1ng chính t\u1eafc c\u1ee7a Parabol là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{x^2}{a^2}-\\dfrac{y^2}{b^2}=1$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{x^2}{a^2}+\\dfrac{y^2}{b^2}=1$<\/span>","<strong>C.<\/strong> y² = 2px, p > 0","<strong>D.<\/strong> y = px²"],"correct":"3","level":"3","hint":"","answer":"<p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>C.<\/strong> y² = 2px, p > 0.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-30 10:19:46","option_type":"math","len":0}]}