Tập hợp các số thực - Bài tập nâng cao

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

{"common":{"save":0,"post_id":"5649","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6766","post_id":"5649","mon_id":"1158532","chapter_id":"1158543","question":"Li\u1ec7t kê các ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p M = { x | x ∈ $\\mathbb{Z}$<\/span>, | x | < 3 }<\/p>","options":["M = {0; 1; 2 } \n ","M = { -2; -1; 0; 1; 2 } \n ","M = { -3; -2; -1; 0; 1; 2; 3 } \n ","M = { 0; 1; 2; 3}"],"correct":"2","level":"3","hint":"T\u1eadp h\u1ee3p M g\u1ed3m các s\u1ed1 nguyên có giá tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 3.<\/p>","answer":"T\u1eadp h\u1ee3p M = { x | x ∈ $\\mathbb{Z}$<\/span>, | x | < 3 } g\u1ed3m các s\u1ed1 nguyên có giá tr\u1ecb tuy\u1ec7t \u0111\u1ed1i nh\u1ecf h\u01a1n 3.<\/p>Do \u0111ó M = { -2; -1; 0; 1; 2 }<\/p>\u0110áp án \u0111úng là  M = { -2; -1; 0; 1; 2 }<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2022-03-28 09:33:40","option_type":"txt","len":2},{"id":"6768","post_id":"5649","mon_id":"1158532","chapter_id":"1158543","question":"Cho t\u1eadp h\u1ee3p M = { 7,2 ; -2,(31) ; 0 ; $\\dfrac{3}{11}$<\/span> ; $\\sqrt{30}$<\/span> ; $-\\sqrt{16}$<\/span> }.<\/p>T\u1eadp h\u1ee3p các s\u1ed1 h\u1eefu t\u1ec9 thu\u1ed9c t\u1eadp h\u1ee3p M là:<\/p>","options":["A<\/strong>. 7,2 ; 0 ; $-\\sqrt{16}$<\/span>","B<\/strong>. 7,2 ; -2,(31) ; 0 \n ","C<\/strong>. $\\dfrac{3}{11}$<\/span> ; $\\sqrt{30}$<\/span> ; $-\\sqrt{16}$<\/span>","D<\/strong>. 7,2 ; -2,(31) ; 0 ; $\\dfrac{3}{11}$<\/span> ; $-\\sqrt{16}$<\/span>"],"correct":"4","level":"3","hint":"Các s\u1ed1 h\u1eefu t\u1ec9 là nh\u1eefng s\u1ed1 vi\u1ebft \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng phân s\u1ed1 $\\dfrac{a}{b}$<\/span> v\u1edbi $a , b$<\/span> là các s\u1ed1 nguyên và b khác 0.<\/p>","answer":"Các s\u1ed1 h\u1eefu t\u1ec9 là:<\/p>7,2 = $\\dfrac{36}{5}$<\/span><\/p>-2,(31) = $\\dfrac{229}{99}$<\/span><\/p>0 = $\\dfrac{0}{1}$<\/span><\/p>$\\dfrac{3}{11}$<\/span><\/p>$-\\sqrt{16} $<\/span> = $-4$<\/span> = $\\dfrac{-4}{1}$<\/span><\/p>\u0110áp án \u0111úng là D<\/strong>. 7,2 ; -2,(31) ; 0 ; $\\dfrac{3}{11}$<\/span> ; $-\\sqrt{16}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2022-03-28 09:38:36","option_type":"math","len":0},{"id":"6770","post_id":"5649","mon_id":"1158532","chapter_id":"1158543","question":"\u0110i\u1ec1n ch\u1eef s\u1ed1 thích h\u1ee3p vào d\u1ea5u ? \u0111\u1ec3 \u0111\u01b0\u1ee3c b\u1ea5t \u0111\u1eb3ng th\u1ee9c.<\/p>-26,3?<\/span>017 < -26,3819<\/p>S\u1ed1 t\u1ea1i d\u1ea5u ? là s\u1ed1: <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p><div class=\"lt123_imgs\"> <\/div>","options":"","correct":["[\"9\"]"],"level":"3","hint":"Chú d\u1ea5u âm (-).<\/p>","answer":"Vì -26,39<\/span>017 < -26,38<\/span>19  V\u1eady ch\u1eef s\u1ed1 c\u1ea7n \u0111i\u1ec1n vào ch\u1ed7 tr\u1ed1ng là 9<\/span>.<\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"3","date":"2022-03-28 09:41:54"}]}