{"common":{"save":0,"post_id":"6595","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6462","post_id":"6595","mon_id":"1158921","chapter_id":"1158930","question":"<p>K\u1ebft qu\u1ea3 rút g\u1ecdn c\u1ee7a phân th\u1ee9c <span class=\"math-tex\">$\\dfrac{x^2}{x(x-1)}$<\/span> là:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{x^2}{x-1}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{x}{x-1}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{x-1}{x}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{x}$<\/span>"],"correct":"2","level":"1","hint":"<p>N\u1ebfu nhân c\u1ea3 t\u1eed và m\u1eabu c\u1ee7a m\u1ed9t phân th\u1ee9c v\u1edbi cùng m\u1ed9t \u0111a th\u1ee9c khác \u0111a th\u1ee9c không thì \u0111\u01b0\u1ee3c m\u1ed9t phân th\u1ee9c m\u1edbi b\u1eb1ng phân th\u1ee9c \u0111ã cho.<\/p><p>N\u1ebfu t\u1eed và m\u1eabu c\u1ee7a m\u1ed9t phân th\u1ee9c có nhân t\u1eed chung thì khi chia c\u1ea3 t\u1eed và m\u1eabu cho nhân t\u1eed chung \u0111ó ta \u0111\u01b0\u1ee3c m\u1ed9t phân th\u1ee9c m\u1edbi b\u1eb1ng phân th\u1ee9c \u0111ã cho.<\/p>","answer":"<p>Ta có: <span class=\"math-tex\">$\\dfrac{x^2}{x(x-1)}= \\dfrac{x}{x-1}$<\/span> (chia t\u1eed và m\u1eabu cho nhân t\u1eed chung <span style=\"color:#2980b9;\"><span class=\"math-tex\">$x$<\/span><\/span>)<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{x}{x-1}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-26 21:55:27","option_type":"math","len":0},{"id":"6463","post_id":"6595","mon_id":"1158921","chapter_id":"1158930","question":"<p>K\u1ebft qu\u1ea3 rút g\u1ecdn c\u1ee7a phân th\u1ee9c <span class=\"math-tex\">$\\dfrac{(x-2)^3}{4x(x-2)^2}$<\/span> là:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{x-2}{4x-2}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{x-2}{4(x-2)}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{x-2}{4x}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{x-2}{x}$<\/span>"],"correct":"3","level":"1","hint":"<p>N\u1ebfu nhân c\u1ea3 t\u1eed và m\u1eabu c\u1ee7a m\u1ed9t phân th\u1ee9c v\u1edbi cùng m\u1ed9t \u0111a th\u1ee9c khác \u0111a th\u1ee9c không thì \u0111\u01b0\u1ee3c m\u1ed9t phân th\u1ee9c m\u1edbi b\u1eb1ng phân th\u1ee9c \u0111ã cho.<\/p><p>N\u1ebfu t\u1eed và m\u1eabu c\u1ee7a m\u1ed9t phân th\u1ee9c có nhân t\u1eed chung thì khi chia c\u1ea3 t\u1eed và m\u1eabu cho nhân t\u1eed chung \u0111ó ta \u0111\u01b0\u1ee3c m\u1ed9t phân th\u1ee9c m\u1edbi b\u1eb1ng phân th\u1ee9c \u0111ã cho.<\/p>","answer":"<p>Ta có: <span class=\"math-tex\">$\\dfrac{(x-2)^3}{4x(x-2)^2}=\\dfrac{x-2}{4x}$<\/span> (chia c\u1ea3 t\u1eed và m\u1eabu cho nhân t\u1eed chung <span style=\"color:#2980b9;\"><span class=\"math-tex\">$(x-2)^2$<\/span><\/span>)<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{x-2}{4x}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-26 21:58:37","option_type":"math","len":0},{"id":"6466","post_id":"6595","mon_id":"1158921","chapter_id":"1158930","question":"<p>Phân th\u1ee9c <span class=\"math-tex\">$\\dfrac{-x}{3-x}$<\/span> b\u1eb1ng phân th\u1ee9c nào?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{x}{3-x}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{-x}{x-3}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{x}{3+x}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{x}{x-3}$<\/span>"],"correct":"4","level":"1","hint":"<p>N\u1ebfu \u0111\u1ed5i d\u1ea5u c\u1ea3 t\u1eed và m\u1eabu c\u1ee7a m\u1ed9t phân th\u1ee9c thì ta \u0111\u01b0\u1ee3c m\u1ed9t phân th\u1ee9c m\u1edbi b\u1eb1ng phân th\u1ee9c \u0111ã cho.<\/p>","answer":"<p>Ta có: <span class=\"math-tex\">$\\dfrac{-x}{3-x}=\\dfrac{-x}{-(x-3)}=\\dfrac{x}{x-3}$<\/span> (\u0111\u1ed5i d\u1ea5u c\u1ea3 t\u1eed và m\u1eabu)<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{x}{x-3}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-26 22:07:29","option_type":"math","len":0}]}