{"common":{"save":0,"post_id":"6538","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5789","post_id":"6538","mon_id":"1158921","chapter_id":"1158927","question":"<p>L&agrave;m t&iacute;nh chia&nbsp;<span class=\"math-tex\">$(\\dfrac{17}{2}x^4y^5z):(\\dfrac{5}{2}xy^2)$<\/span>.<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\dfrac{17}{5}x^3y^3z$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\dfrac{17}{5}x^3y^3$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$17x^3y^3z$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\dfrac{5}{17}x^3y^3z$<\/span>"],"correct":"1","level":"1","hint":"<p>Mu\u1ed1n chia \u0111\u01a1n th\u1ee9c A cho \u0111\u01a1n th\u1ee9c B (tr\u01b0\u1eddng h\u1ee3p chia h\u1ebft), ta l&agrave;m nh\u01b0 sau:<\/p><p>+ Chia h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c A cho h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c B.<\/p><p>+ Chia l\u0169y th\u1eeba c\u1ee7a t\u1eebng bi\u1ebfn trong A cho l\u0169y th\u1eeba c\u1ee7a c&ugrave;ng bi\u1ebfn \u0111&oacute;&nbsp;trong B.<\/p><p>+ Nh&acirc;n c&aacute;c k\u1ebft qu\u1ea3 t&igrave;m \u0111\u01b0\u1ee3c v\u1edbi nhau.<\/p>","answer":"<p><span class=\"math-tex\">$(\\dfrac{17}{2}x^4y^5z):(\\dfrac{5}{2}xy^2)$<\/span><\/p><p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$\\dfrac{17}{2}:\\dfrac{5}{2}=\\dfrac{17}{5}$<\/span><\/p><p><span class=\"math-tex\">$x^4:x=x^3$<\/span><\/p><p><span class=\"math-tex\">$y^5:y^2=y^3$<\/span><\/p><p>Nh&acirc;n c&aacute;c k\u1ebft qu\u1ea3 ta \u0111\u01b0\u1ee3c&nbsp;<span class=\"math-tex\">$(\\dfrac{17}{2}x^4y^5z):(\\dfrac{5}{2}xy^2)$<\/span><span class=\"math-tex\">$=\\dfrac{17}{5}x^3y^3z$<\/span><\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.&nbsp;<\/strong><span class=\"math-tex\">$\\dfrac{17}{5}x^3y^3z$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-02 04:51:56","option_type":"math","len":0},{"id":"5790","post_id":"6538","mon_id":"1158921","chapter_id":"1158927","question":"<p>L&agrave;m t&iacute;nh chia&nbsp;<span class=\"math-tex\">$(18xy^7z^3):(-9xz)$<\/span>.<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$2y^7z^2$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$2xy^6z^2$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$-2y^7z^2$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$-2y^6z^2$<\/span>"],"correct":"3","level":"1","hint":"<p>Mu\u1ed1n chia \u0111\u01a1n th\u1ee9c A cho \u0111\u01a1n th\u1ee9c B (tr\u01b0\u1eddng h\u1ee3p chia h\u1ebft), ta l&agrave;m nh\u01b0 sau:<\/p><p>+ Chia h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c A cho h\u1ec7 s\u1ed1 c\u1ee7a \u0111\u01a1n th\u1ee9c B.<\/p><p>+ Chia l\u0169y th\u1eeba c\u1ee7a t\u1eebng bi\u1ebfn trong A cho l\u0169y th\u1eeba c\u1ee7a c&ugrave;ng bi\u1ebfn \u0111&oacute;&nbsp;trong B.<\/p><p>+ Nh&acirc;n c&aacute;c k\u1ebft qu\u1ea3 t&igrave;m \u0111\u01b0\u1ee3c v\u1edbi nhau.<\/p>","answer":"<p><span class=\"math-tex\">$(18xy^7z^3):(-9xz)$<\/span>&nbsp;<span class=\"math-tex\">$=-2y^7z^2$<\/span><\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.&nbsp;<\/strong><span class=\"math-tex\">$-2y^7z^2$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-02 04:59:09","option_type":"math","len":0},{"id":"5792","post_id":"6538","mon_id":"1158921","chapter_id":"1158927","question":"<p>\u0110\u01a1n th\u1ee9c&nbsp;<span class=\"math-tex\">$x^4y^2$<\/span> chia h\u1ebft cho \u0111\u01a1n th\u1ee9c n&agrave;o sau \u0111&acirc;y?<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$-x^4y^2z$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$3xy^2$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$15xy^3$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$-2x^5$<\/span>"],"correct":"2","level":"1","hint":"<p>\u0110\u01a1n th\u1ee9c A chia h\u1ebft cho \u0111\u01a1n th\u1ee9c B (B&nbsp;<span class=\"math-tex\">$\\ne$<\/span> 0) khi m\u1ed7i bi\u1ebfn c\u1ee7a B \u0111\u1ec1u l&agrave; bi\u1ebfn c\u1ee7a A v\u1edbi s\u1ed1 m\u0169 kh&ocirc;ng l\u1edbn h\u01a1n s\u1ed1 m\u0169 c\u1ee7a n&oacute; trong A.<\/p>","answer":"<p>\u0110\u01a1n th\u1ee9c <strong>A.&nbsp;<\/strong><span class=\"math-tex\">$-x^4y^2z$<\/span> c&oacute; bi\u1ebfn z kh&ocirc;ng c&oacute; trong&nbsp;\u0111\u01a1n th\u1ee9c&nbsp;<span class=\"math-tex\">$x^4y^2$<\/span>.<\/p><p>\u0110\u01a1n th\u1ee9c <strong>C.&nbsp;<\/strong><span class=\"math-tex\">$15xy^3$<\/span> c&oacute; bi\u1ebfn y v\u1edbi s\u1ed1 m\u0169 3 l\u1edbn h\u01a1n s\u1ed1 m\u0169 c\u1ee7a n&oacute; trong&nbsp;\u0111\u01a1n th\u1ee9c&nbsp;<span class=\"math-tex\">$x^4y^2$<\/span>.<\/p><p>\u0110\u01a1n th\u1ee9c&nbsp;<strong>D.&nbsp;<\/strong><span class=\"math-tex\">$-2x^5$<\/span>&nbsp;c&oacute;&nbsp;bi\u1ebfn x v\u1edbi s\u1ed1 m\u0169 5 l\u1edbn h\u01a1n s\u1ed1 m\u0169 c\u1ee7a n&oacute; trong&nbsp;\u0111\u01a1n th\u1ee9c&nbsp;<span class=\"math-tex\">$x^4y^2$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.&nbsp;<\/strong><span class=\"math-tex\">$3xy^2$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-07-02 05:06:57","option_type":"math","len":0}]}