{"common":{"save":0,"post_id":"6607","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6531","post_id":"6607","mon_id":"1158921","chapter_id":"1158930","question":"<p>T&igrave;m bi\u1ec3u th\u1ee9c M sao cho&nbsp;<span class=\"math-tex\">$M.\\dfrac{2x}{x-1}=\\dfrac{4x^2}{(x-1)^2}$<\/span>.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$M=\\dfrac{2x}{x+1}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$M=\\dfrac{x}{x-1}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$M=\\dfrac{4x}{x-1}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$M=\\dfrac{2x}{x-1}$<\/span>"],"correct":"4","level":"2","hint":"","answer":"<p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$M.\\dfrac{2x}{x-1}=\\dfrac{4x^2}{(x-1)^2}$<\/span><\/p><p>Suy ra&nbsp;<span class=\"math-tex\">$M=\\dfrac{4x^2}{(x-1)^2}:\\dfrac{2x}{x-1}$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$M=\\dfrac{4x^2}{(x-1)^2}.\\dfrac{x-1}{2x}$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$M=\\dfrac{2x}{x-1}$<\/span><\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;<span class=\"math-tex\">$M=\\dfrac{2x}{x-1}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-27 01:32:37","option_type":"math","len":0},{"id":"6532","post_id":"6607","mon_id":"1158921","chapter_id":"1158930","question":"<p>T&igrave;m bi\u1ec3u th\u1ee9c M sao cho&nbsp;<span class=\"math-tex\">$\\dfrac{-1}{x+2}.M=\\dfrac{7x}{x^2-4}$<\/span>.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$M=\\dfrac{-x}{x-2}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$M=\\dfrac{-7x}{x-2}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$M=\\dfrac{7x}{x-1}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$M=\\dfrac{-7}{x-2}$<\/span>"],"correct":"2","level":"2","hint":"","answer":"<p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$\\dfrac{-1}{x+2}.M=\\dfrac{7x}{x^2-4}$<\/span><\/p><p>Suy ra&nbsp;<span class=\"math-tex\">$M=\\dfrac{7x}{x^2-4}:\\dfrac{-1}{x+2}$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$M=\\dfrac{7x}{(x-2)(x+2)}.\\dfrac{x+2}{-1}$<\/span><\/p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<span class=\"math-tex\">$M=\\dfrac{-7x}{x-2}$<\/span><\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong>&nbsp;<span class=\"math-tex\">$M=\\dfrac{-7x}{x-2}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-27 01:34:00","option_type":"math","len":0},{"id":"6535","post_id":"6607","mon_id":"1158921","chapter_id":"1158930","question":"<p>Th\u1ef1c hi\u1ec7n ph&eacute;p t&iacute;nh&nbsp;<span class=\"math-tex\">$\\dfrac{3x^5}{y^6}:\\dfrac{9x^3}{y^5}.\\dfrac{-1}{x}$<\/span><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{-y}{3x}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{-1}{3y}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{-x}{3y}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{-x}{3}$<\/span>"],"correct":"3","level":"2","hint":"","answer":"<p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$\\dfrac{3x^5}{y^6}:\\dfrac{9x^3}{y^5}.\\dfrac{-1}{x}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$\\dfrac{3x^5}{y^6}.\\dfrac{y^5}{9x^3}.\\dfrac{-1}{x}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$\\dfrac{-x}{3y}$<\/span><\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{-x}{3y}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-27 01:39:27","option_type":"math","len":0}]}