{"common":{"save":0,"post_id":"5803","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8450","post_id":"5803","mon_id":"1158532","chapter_id":"1158660","question":"<p>Ch\u1ecdn nh\u1eefng bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1 ch\u1ec9 có<strong> m\u1ed9t bi\u1ebfn<\/strong><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x\u00b2 + 3$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$3 . 2 + 9$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$9 + 6 : 3y$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$a + 2b$<\/span>"],"correct":"[\"1\",\"3\"]","level":"1","hint":"<p>Bi\u1ec3u th\u1ee9c không ch\u1ee9a ch\u1eef g\u1ecdi là bi\u1ec3u th\u1ee9c s\u1ed1.<\/p><p>Bi\u1ec3u th\u1ee9c ch\u1ec9 ch\u1ee9a s\u1ed1 ho\u1eb7c ch\u1ec9 ch\u1ee9a ch\u1eef ho\u1eb7c ch\u1ee9a c\u1ea3 s\u1ed1 và ch\u1eef g\u1ecdi chung là bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1.<\/p><p>Các ch\u1eef trong bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1 dùng \u0111\u1ec3 thay th\u1ec3 cho các s\u1ed1 và \u0111\u01b0\u1ee3c g\u1ecdi là bi\u1ebfn s\u1ed1 (bi\u1ebfn).<\/p>","answer":"<p><strong>A.<\/strong> <span class=\"math-tex\">$x\u00b2 + 3$<\/span> (bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1 m\u1ed9t bi\u1ebfn x)<\/p><p><strong>B. <\/strong><span class=\"math-tex\">$3 . 2 + 9$<\/span> (bi\u1ec3u th\u1ee9c s\u1ed1, không ch\u1ee9a bi\u1ebfn)<\/p><p><strong>C.<\/strong> <span class=\"math-tex\">$9 + 6 : 3y$<\/span> (bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1 m\u1ed9t bi\u1ebfn y)<\/p><p><strong>D.<\/strong> <span class=\"math-tex\">$a + 2b$<\/span> (bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1 hai bi\u1ebfn a và b)<\/p><p>Các \u0111áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>A.<\/strong> <span class=\"math-tex\">$x\u00b2 + 3$<\/span> <\/span> và<span style=\"color:#16a085;\"> <strong>C.<\/strong> <span class=\"math-tex\">$9 + 6 : 3y$<\/span><\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"131","test":"3","date":"2022-05-31 02:03:36","option_type":"math","len":0},{"id":"8451","post_id":"5803","mon_id":"1158532","chapter_id":"1158660","question":"<p>Bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1 nào sau \u0111ây bi\u1ec3u th\u1ecb t\u1ed5ng c\u1ee7a x và a ?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x-a$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$x+a$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$a-x$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$x:a$<\/span>"],"correct":"2","level":"1","hint":"<p>T\u1ed5ng là phép c\u1ed9ng.<\/p>","answer":"<p>Bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1 bi\u1ec3u th\u1ecb t\u1ed5ng c\u1ee7a x và a là <span class=\"math-tex\">$x+a$<\/span>.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B. <\/strong><span class=\"math-tex\">$x+a$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-31 02:05:54","option_type":"math","len":0},{"id":"8453","post_id":"5803","mon_id":"1158532","chapter_id":"1158660","question":"<p>Ch\u1ecdn câu \u0111úng nh\u1ea5t<\/p><p>Các phép toán trên các bi\u1ec3u th\u1ee9c \u0111\u1ea1i s\u1ed1 có nh\u1eefng tính ch\u1ea5t nào sau \u0111ây?<\/p>","options":["<strong>A.<\/strong> Tính ch\u1ea5t giao hoán c\u1ee7a phép c\u1ed9ng","<strong>B.<\/strong> Tính ch\u1ea5t phân ph\u1ed1i c\u1ee7a phép nhân \u0111\u1ed1i v\u1edbi phép c\u1ed9ng","<strong>C. <\/strong>Tính ch\u1ea5t nhân hai l\u0169y th\u1eeba cùng c\u01a1 s\u1ed1","<strong>D. <\/strong>C\u1ea3 ba tính ch\u1ea5t trên"],"correct":"4","level":"1","hint":"<p>V\u1edbi các bi\u1ebfn ta c\u0169ng có th\u1ec3 áp d\u1ee5ng các quy t\u1eafc và tính ch\u1ea5t c\u1ee7a các phép toán nh\u01b0 \u0111\u1ed1i v\u1edbi các s\u1ed1, ch\u1eb3ng h\u1ea1n tính ch\u1ea5t giao hoán và tính ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a phép c\u1ed9ng, tính ch\u1ea5t giao hoán và tính ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a phép nhân, tính ch\u1ea5t phân ph\u1ed1i c\u1ee7a phép nhân \u0111\u1ed1i v\u1edbi phép c\u1ed9ng, tính ch\u1ea5t nhân hai l\u0169y th\u1eeba cùng c\u01a1 s\u1ed1, ...<\/p>","answer":"<p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>D. <\/strong>C\u1ea3 ba tính ch\u1ea5t trên<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-05-31 02:17:49","option_type":"txt","len":3}]}