Tập hợp các số thực - Bài tập trung bình

Home Lớp 7 Toán lớp 7 - Sách kết nối tri thức Bài 7: Tập hợp các số thựcBài tập trung bình

{"common":{"save":0,"post_id":"5648","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6749","post_id":"5648","mon_id":"1158532","chapter_id":"1158543","question":"Trong các cách vi\u1ebft sau, cách vi\u1ebft nào sai?<\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/do-vat\/\u0111\u00f4i gi\u1ea7y 2.png\" \/><\/div>","options":["$\\sqrt{3} \\in \\mathbb{Q}$<\/span>","$15 \\in \\mathbb{R}$<\/span>","$ \\dfrac{1}{2} \\in \\mathbb{Q}$<\/span>"],"correct":"1","level":"2","hint":"$\\mathbb{Q}$<\/span> là t\u1eadp h\u1ee3p các s\u1ed1 h\u1eefu t\u1ec9.<\/p>$\\mathbb{R}$<\/span> là t\u1eadp h\u1ee3p các s\u1ed1 th\u1ef1c.<\/p>","answer":"$\\sqrt{3} \\in \\mathbb{Q}$<\/span>    Sai <\/span>vì $\\sqrt{3} $<\/span> là s\u1ed1 vô t\u1ec9, không ph\u1ea3i s\u1ed1 h\u1eefu t\u1ec9. \u0110áp án \u0111úng là $\\sqrt{3} \\in \\mathbb{Q}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-03-28 08:57:36","option_type":"math","len":0},{"id":"6750","post_id":"5648","mon_id":"1158532","chapter_id":"1158543","question":"V\u1edbi ba s\u1ed1 th\u1ef1c a, b, c. N\u1ebfu a <div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/do-vat\/2hop-but-chi.png\" \/><\/div>","options":["a < c ","a > c ","a = c"],"correct":"1","level":"2","hint":"Tính ch\u1ea5t b\u1eafc c\u1ea7u.<\/p>","answer":"V\u1edbi ba s\u1ed1 th\u1ef1c a, b, c. N\u1ebfu a a < c <\/span>(tính ch\u1ea5t b\u1eafc c\u1ea7u). \u0110áp án \u0111úng là  a < c <\/span><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"131","test":"1","date":"2022-03-28 08:59:12","option_type":"txt","len":0},{"id":"6751","post_id":"5648","mon_id":"1158532","chapter_id":"1158543","question":"S\u1ed1 \u0111\u1ed1i c\u1ee7a các s\u1ed1: 3,2 ; -5,(01) ; $\\sqrt{2}$<\/span>  ; 0 l\u1ea7n l\u01b0\u1ee3t là<\/p><img class=\"img_dd small\" src=\"\/data\/library\/do-vat\/ball.png\" \/><\/p>","options":["A.<\/strong> 3,2 ; -5,(01) ; $\\sqrt{2}$<\/span> ; 0","B.<\/strong> -3,2 ; 5,(01) ; $-\\sqrt{2}$<\/span> ; 0 \n ","C.<\/strong> 3,2 ; 5,(01) ; $\\sqrt{2}$<\/span> ; 0 \n ","D.<\/strong> -3,2 ; -5,(01) ; $-\\sqrt{2}$<\/span> ; 0"],"correct":"2","level":"2","hint":"","answer":"S\u1ed1 \u0111\u1ed1i c\u1ee7a 3,2 là       -3,2<\/span>. S\u1ed1 \u0111\u1ed1i c\u1ee7a -5,(01) là 5,(01)<\/span> S\u1ed1 \u0111\u1ed1i c\u1ee7a $\\sqrt{2}$<\/span>  là       $-\\sqrt{2}$<\/span><\/span>  S\u1ed1 \u0111\u1ed1i c\u1ee7a 0 là             0<\/span>. V\u1eady \u0111áp án \u0111úng là  B.<\/strong> -3,2 ; 5,(01) ; $-\\sqrt{2}$<\/span> ; 0<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-03-28 09:03:05","option_type":"math","len":0}]}