{"common":{"save":0,"post_id":"6593","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6418","post_id":"6593","mon_id":"1158921","chapter_id":"1158930","question":"<p>\u0110i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh c\u1ee7a phân th\u1ee9c <span class=\"math-tex\">$\\dfrac{x-5}{x^2+5x}$<\/span> là<\/p>","options":["<strong>A.<\/strong> x ≠ 0","<strong>B.<\/strong> x ≠ 0 và x ≠ –5","<strong>C.<\/strong> x ≠ 5","<strong>D.<\/strong> x ≠ –5"],"correct":"2","level":"3","hint":"","answer":"<p>\u0110i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh c\u1ee7a phân th\u1ee9c là<\/p><p>x² + 5x <span class=\"math-tex\">$\\ne$<\/span> 0 <\/p><p>x(x + 5) <span class=\"math-tex\">$\\ne$<\/span> 0<\/p><p>x <span class=\"math-tex\">$\\ne$<\/span> 0 và x + 5 <span class=\"math-tex\">$\\ne$<\/span> 0<\/p><p>x <span class=\"math-tex\">$\\ne$<\/span> 0 và x <span class=\"math-tex\">$\\ne$<\/span> – 5<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> x <span class=\"math-tex\">$\\ne$<\/span> 0 và x <span class=\"math-tex\">$\\ne$<\/span> –5 .<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-20 04:54:04","option_type":"txt","len":2},{"id":"6420","post_id":"6593","mon_id":"1158921","chapter_id":"1158930","question":"<p>\u0110i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh c\u1ee7a phân th\u1ee9c <span class=\"math-tex\">$\\dfrac{1}{x^3-x}$<\/span> là<\/p>","options":["<strong>A.<\/strong> x <span class=\"math-tex\">$\\ne$<\/span> 0","<strong>B.<\/strong> x <span class=\"math-tex\">$\\ne$<\/span> 1","<strong>C.<\/strong> x <span class=\"math-tex\">$\\ne$<\/span> – 1","<strong>D.<\/strong> x <span class=\"math-tex\">$\\ne$<\/span> 0, x <span class=\"math-tex\">$\\ne$<\/span> 1, x <span class=\"math-tex\">$\\ne$<\/span> – 1"],"correct":"4","level":"3","hint":"","answer":"<p>Ta có x³ – x = x(x² – 1) = x(x – 1)(x + 1) .<\/p><p>Do \u0111ó \u0111i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh c\u1ee7a phân th\u1ee9c <span class=\"math-tex\">$\\dfrac{1}{x^3-x}$<\/span> là <span style=\"color:#16a085;\"><strong>D.<\/strong> x <span class=\"math-tex\">$\\ne$<\/span> 0, x <span class=\"math-tex\">$\\ne$<\/span> 1, x <span class=\"math-tex\">$\\ne$<\/span> – 1.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-25 21:29:58","option_type":"math","len":0},{"id":"6423","post_id":"6593","mon_id":"1158921","chapter_id":"1158930","question":"<p>Ch\u1ecdn nh\u1eefng phân th\u1ee9c có \u0111i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh gi\u1ed1ng nhau.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{x(x+1)}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{x^2-1}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{3x}{(x-1)(x-2)}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{3x^2+3x}$<\/span>"],"correct":"[\"1\",\"4\"]","level":"3","hint":"","answer":"<p><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{x(x+1)}$<\/span> có \u0111i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh là <span style=\"color:#16a085;\">x <span class=\"math-tex\">$\\ne$<\/span> 0 và x <span class=\"math-tex\">$\\ne$<\/span> – 1<\/span> .<\/p><p><strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{x^2-1}$<\/span> có \u0111i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh là x <span class=\"math-tex\">$\\ne$<\/span> 1 và x <span class=\"math-tex\">$\\ne$<\/span> – 1 .<\/p><p><strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{3x}{(x-1)(x-2)}$<\/span> có \u0111i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh là x <span class=\"math-tex\">$\\ne$<\/span> 1 và x <span class=\"math-tex\">$\\ne$<\/span> 2 .<\/p><p><strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{3x^2+3x}$<\/span> có \u0111i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh là <span style=\"color:#16a085;\">x <span class=\"math-tex\">$\\ne$<\/span> 0 và x <span class=\"math-tex\">$\\ne$<\/span> – 1<\/span> .<\/p><p>Các phân th\u1ee9c có \u0111i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh gi\u1ed1ng nhau là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{x(x+1)}$<\/span> và <strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{3x^2+3x}$<\/span> .<\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"131","test":"0","date":"2023-08-25 21:35:19","option_type":"math","len":0}]}