{"common":{"save":0,"post_id":"6535","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5715","post_id":"6535","mon_id":"1158921","chapter_id":"1158927","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a phép nhân <span class=\"math-tex\">$\\bigg(-5x^2y^3\\bigg).\\bigg(\\dfrac{1}{10}xy\\bigg)$<\/span> là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{-1}{2}x^3y^4$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{2}x^3y^4$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$50x^3y^4$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$-5x^3y^4$<\/span>"],"correct":"1","level":"1","hint":"<p>Mu\u1ed1n nhân hai \u0111\u01a1n th\u1ee9c, ta nhân hai h\u1ec7 s\u1ed1 v\u1edbi nhau và nhân hai ph\u1ea7n bi\u1ebfn v\u1edbi nhau.<\/p>","answer":"<p>Ta có <span class=\"math-tex\">$\\bigg(-5x^2y^3\\bigg).\\bigg(\\dfrac{1}{10}xy\\bigg)$<\/span> = <span class=\"math-tex\">$\\bigg(-5.\\dfrac{1}{10} \\bigg).\\bigg(x^2y^3 . xy \\bigg)$<\/span> = <span class=\"math-tex\">$\\dfrac{-1}{2}x^3y^4$<\/span> .<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{-1}{2}x^3y^4$<\/span>.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-06-29 11:08:20","option_type":"math","len":0},{"id":"5717","post_id":"6535","mon_id":"1158921","chapter_id":"1158927","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a phép nhân <span class=\"math-tex\">$\\bigg(\\dfrac{-6}{7}xyz \\bigg) . \\bigg( 14x^2y\\bigg)$<\/span> là<\/p>","options":["<strong>A.<\/strong> 12xy²z","<strong>B.<\/strong> –12x²yz","<strong>C.<\/strong> –12x³y²z","<strong>D.<\/strong> 12x³yz"],"correct":"3","level":"1","hint":"<p>Mu\u1ed1n nhân hai \u0111\u01a1n th\u1ee9c, ta nhân hai h\u1ec7 s\u1ed1 v\u1edbi nhau và nhân hai ph\u1ea7n bi\u1ebfn v\u1edbi nhau.<\/p>","answer":"<p>Ta có <span class=\"math-tex\">$\\bigg(\\dfrac{-6}{7}xyz \\bigg) . \\bigg( 14x^2y\\bigg)$<\/span> = <span class=\"math-tex\">$\\bigg(\\dfrac{-6}{7}.14 \\bigg) . \\bigg( xyz . x^2y\\bigg)$<\/span> = –12x³y²z .<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>C.<\/strong> –12x³y²z.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-06-29 11:11:59","option_type":"txt","len":2},{"id":"5719","post_id":"6535","mon_id":"1158921","chapter_id":"1158927","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a phép nhân <span class=\"math-tex\">$\\bigg(\\dfrac{-3}{4}xy\\bigg) . \\bigg(\\dfrac{-20}{3}xy^2\\bigg)$<\/span> là<\/p>","options":["<strong>A.<\/strong> –5x²y³","<strong>B.<\/strong> 5xy³","<strong>C.<\/strong> –5x²y","<strong>D.<\/strong> 5x²y³"],"correct":"4","level":"1","hint":"<p>Mu\u1ed1n nhân hai \u0111\u01a1n th\u1ee9c, ta nhân hai h\u1ec7 s\u1ed1 v\u1edbi nhau và nhân hai ph\u1ea7n bi\u1ebfn v\u1edbi nhau.<\/p>","answer":"<p>Ta có <span class=\"math-tex\">$\\bigg(\\dfrac{-3}{4}xy\\bigg) . \\bigg(\\dfrac{-20}{3}xy^2\\bigg)$<\/span> = <span class=\"math-tex\">$\\bigg(\\dfrac{-3}{4}.\\dfrac{-20}{3}\\bigg).\\bigg(xy . xy^2 \\bigg)$<\/span> = 5x²y³ .<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>D.<\/strong> 5x²y³.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-02 01:03:23","option_type":"txt","len":2}]}
