Đơn thức - Bài tập nâng cao

Home Lớp 8 Toán lớp 8 - Sách Kết nối tri thức Bài 1. Đơn thứcBài tập nâng cao

{"common":{"save":0,"post_id":"6528","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5695","post_id":"6528","mon_id":"1158921","chapter_id":"1158927","question":"Ch\u1ecdn nhóm có các \u0111\u01a1n th\u1ee9c không \u0111\u1ed3ng d\u1ea1ng<\/strong> v\u1edbi nhau.<\/p>","options":["A.<\/strong> x³y ; –x³y ; ($\\sqrt{3}$<\/span> + 1)x³y.","B.<\/strong> xy² ; 5y²x ; $\\dfrac{xy^2}{5}$<\/span> .","C.<\/strong> x$\\sqrt{2}$<\/span> ; 5x ; $\\dfrac{-x}{4}$<\/span> .","D.<\/strong> xy²z ; $\\bigg(\\dfrac{5}{2}+\\sqrt{5}\\bigg)$<\/span>xy²z ; –xyz² ."],"correct":"4","level":"3","hint":"","answer":"Nhóm ch\u1ee9a các \u0111\u01a1n th\u1ee9c không<\/strong> \u0111\u1ed3ng d\u1ea1ng v\u1edbi nhau là  D.<\/strong> xy²z ; $\\bigg(\\dfrac{5}{2}+\\sqrt{5}\\bigg)$<\/span>xy²z ; –xyz² .<\/span><\/p>( –xyz²  không \u0111\u1ed3ng d\u1ea1ng v\u1edbi  xy²z  và $\\bigg(\\dfrac{5}{2}+\\sqrt{5}\\bigg)$<\/span>xy²z ).<\/p>\u0110áp án \u0111úng là   D.<\/strong> xy²z ; $\\bigg(\\dfrac{5}{2}+\\sqrt{5}\\bigg)$<\/span>xy²z ; –xyz² .<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-06-28 12:03:22","option_type":"math","len":0},{"id":"5697","post_id":"6528","mon_id":"1158921","chapter_id":"1158927","question":"M\u1ed7i quy\u1ec3n v\u1edf có giá 10000 \u0111\u1ed3ng. Lan mua x quy\u1ec3n v\u1edf. \u0110\u01a1n th\u1ee9c bi\u1ec3u th\u1ecb s\u1ed1 ti\u1ec1n Lan ph\u1ea3i tr\u1ea3 là<\/p>","options":["A.<\/strong> 10000x","B.<\/strong> x + 10000","C.<\/strong> $\\dfrac{x}{10000}$<\/span>","D.<\/strong> x – 10000"],"correct":"1","level":"3","hint":"","answer":"M\u1ed7i quy\u1ec3n v\u1edf có giá 10000 \u0111\u1ed3ng. Lan mua x quy\u1ec3n v\u1edf. Do \u0111ó s\u1ed1 ti\u1ec1n Lan ph\u1ea3i tr\u1ea3 là<\/p>10000.x (\u0111\u1ed3ng).<\/p>\u0110áp án \u0111úng là   A.<\/strong> 10000x.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-06-28 12:05:59","option_type":"math","len":0},{"id":"5698","post_id":"6528","mon_id":"1158921","chapter_id":"1158927","question":"M\u1ed7i ngày Lan ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c x nghìn \u0111\u1ed3ng. H\u1ecfi sau y tu\u1ea7n, Lan ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c bao nhiêu ti\u1ec1n?<\/p>\u0110\u01a1n th\u1ee9c nào sau \u0111ây bi\u1ec3u th\u1ecb s\u1ed1 ti\u1ec1n Lan ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c?<\/p>","options":["A.<\/strong> x + y","B.<\/strong> 7x","C.<\/strong> xy","D.<\/strong> 7xy"],"correct":"4","level":"3","hint":"","answer":"Vì m\u1ed7i tu\u1ea7n có 7 ngày nên sau 1 tu\u1ea7n s\u1ed1 ti\u1ec1n Lan ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c là<\/p>x . 7 = 7x  (nghìn \u0111\u1ed3ng).<\/p>S\u1ed1 ti\u1ec1n Lan ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c sau y tu\u1ea7n là<\/p>y . 7x = 7xy  (nghìn \u0111\u1ed3ng).<\/p>V\u1eady \u0111\u01a1n th\u1ee9c bi\u1ec3u th\u1ecb s\u1ed1 ti\u1ec1n Lan ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c là  7xy.<\/p>\u0110áp án \u0111úng là   D.<\/strong> 7xy.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-06-28 12:10:37","option_type":"txt","len":0}]}