{"common":{"save":0,"post_id":"6633","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6547","post_id":"6633","mon_id":"1158921","chapter_id":"1158933","question":"<p>M\u1ed9t m\u1ea3nh v\u01b0\u1eddn hình ch\u1eef nh\u1eadt có chi\u1ec1u dài là x (m) và chi\u1ec1u r\u1ed9ng kém chi\u1ec1u dài là 10 (m). Bi\u1ec3u th\u1ee9c bi\u1ec3u th\u1ecb chi\u1ec1u r\u1ed9ng c\u1ee7a m\u1ea3nh v\u01b0\u1eddn là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x-10$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$x+10$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$10x$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$10-x$<\/span>"],"correct":"1","level":"1","hint":"","answer":"<p>Vì chi\u1ec1u dài là x (m) và chi\u1ec1u r\u1ed9ng kém chi\u1ec1u dài là 10 (m) nên bi\u1ec3u th\u1ee9c bi\u1ec3u th\u1ecb chi\u1ec1u r\u1ed9ng c\u1ee7a m\u1ea3nh v\u01b0\u1eddn là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$x-10$<\/span> .<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-27 09:38:10","option_type":"math","len":0},{"id":"6549","post_id":"6633","mon_id":"1158921","chapter_id":"1158933","question":"<p>M\u1ed9t m\u1ea3nh v\u01b0\u1eddn hình ch\u1eef nh\u1eadt có chi\u1ec1u dài là x (m) và chi\u1ec1u r\u1ed9ng kém chi\u1ec1u dài là 10 (m). Bi\u1ec3u th\u1ee9c bi\u1ec3u th\u1ecb chu vi c\u1ee7a m\u1ea3nh v\u01b0\u1eddn là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$2(2x+10)$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$2(2x-10)$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$2(x-10)$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$2(x+10)$<\/span>"],"correct":"2","level":"1","hint":"<p>Chu vi hình ch\u1eef nh\u1eadt = 2.(chi\u1ec1u dài + chi\u1ec1u r\u1ed9ng) .<\/p>","answer":"<p>Chi\u1ec1u r\u1ed9ng c\u1ee7a m\u1ea3nh v\u01b0\u1eddn là <span class=\"math-tex\">$x-10$<\/span> (m).<\/p><p>Chu vi c\u1ee7a m\u1ea3nh v\u01b0\u1eddn là <span class=\"math-tex\">$2(x+x-10)$<\/span> = <span class=\"math-tex\">$2(2x-10)$<\/span> (m).<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> <span class=\"math-tex\">$2(2x-10)$<\/span>.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-27 09:41:34","option_type":"math","len":0},{"id":"6550","post_id":"6633","mon_id":"1158921","chapter_id":"1158933","question":"<p>M\u1ed9t m\u1ea3nh v\u01b0\u1eddn hình ch\u1eef nh\u1eadt có chi\u1ec1u dài là x (m) và chi\u1ec1u r\u1ed9ng kém chi\u1ec1u dài là 10 (m). Bi\u1ec3u th\u1ee9c bi\u1ec3u th\u1ecb di\u1ec7n tích c\u1ee7a m\u1ea3nh v\u01b0\u1eddn là<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x(x+10)$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$10-x$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$2x.(x+10)$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$x(x-10)$<\/span>"],"correct":"4","level":"1","hint":"<p>Di\u1ec7n tích hình ch\u1eef nh\u1eadt = chi\u1ec1u dài x chi\u1ec1u r\u1ed9ng .<\/p>","answer":"<p>Chi\u1ec1u r\u1ed9ng c\u1ee7a m\u1ea3nh v\u01b0\u1eddn là <span class=\"math-tex\">$x-10$<\/span> (m).<\/p><p>Di\u1ec7n tích c\u1ee7a m\u1ea3nh v\u01b0\u1eddn là <span class=\"math-tex\">$x(x-10)$<\/span> (m²).<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>D.<\/strong> <span class=\"math-tex\">$x(x-10)$<\/span>.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2023-08-27 09:44:47","option_type":"math","len":0}]}