Mệnh đề - Bài tập nâng cao số 2

Home Lớp 10 Toán lớp 10 - Sách Kết nối tri thức Bài 1: Mệnh đềBài tập nâng cao

{"common":{"save":0,"post_id":"6149","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5231","mon_id":"1158767","chapter_id":"1158770","post_id":"6149","question":"Phát bi\u1ec3u b\u1eb1ng l\u1eddi m\u1ec7nh \u0111\u1ec1 sau:<\/p>" $\\forall x \\in \\mathbb{R}, x^2 \\ge 0$<\/span><\/span> "<\/p>","options":["A.<\/strong> Bình ph\u01b0\u01a1ng c\u1ee7a m\u1ecdi s\u1ed1 th\u1ef1c \u0111\u1ec1u không âm.","B. <\/strong>Bình ph\u01b0\u01a1ng c\u1ee7a m\u1ecdi s\u1ed1 th\u1ef1c \u0111\u1ec1u b\u1eb1ng 0.","C. <\/strong>T\u1ed3n t\u1ea1i m\u1ed9t s\u1ed1 th\u1ef1c có bình ph\u01b0\u01a1ng là m\u1ed9t s\u1ed1 không âm.","D. <\/strong>Có duy nh\u1ea5t s\u1ed1 0 có bình ph\u01b0\u01a1ng không âm."],"correct":"1","level":"3","hint":"","answer":"\u0110áp án \u0111úng là   A.<\/strong> Bình ph\u01b0\u01a1ng c\u1ee7a m\u1ecdi s\u1ed1 th\u1ef1c \u0111\u1ec1u không âm.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-08-29 15:01:45","option_type":"txt","len":3},{"id":"5233","mon_id":"1158767","chapter_id":"1158770","post_id":"6149","question":"Kí hi\u1ec7u $X$<\/span> là t\u1eadp h\u1ee3p các c\u1ea7u th\u1ee7 $x$<\/span> trong \u0111\u1ed9i tuy\u1ec3n bóng r\u1ed5, $P(x)$<\/span>  là m\u1ec7nh \u0111\u1ec1 ch\u1ee9a bi\u1ebfn " $x$<\/span> cao trên 180 cm". M\u1ec7nh \u0111\u1ec1: "$\\forall x \\in X, P(x)$<\/span><\/span>"  kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng<\/p>","options":["A.<\/strong> M\u1ecdi c\u1ea7u th\u1ee7 trong \u0111\u1ed9i tuy\u1ec3n bóng r\u1ed5 \u0111\u1ec1u cao trên 180cm.","B. <\/strong>Trong s\u1ed1 các c\u1ea7u th\u1ee7 c\u1ee7a \u0111\u1ed9i tuy\u1ec3n bóng r\u1ed1 có m\u1ed9t s\u1ed1 c\u1ea7u th\u1ee7 cao trên 180 cm.","C. <\/strong>B\u1ea5t c\u1ee9 ai cao trên 180 cm \u0111\u1ec1u là c\u1ea7u th\u1ee7 c\u1ee7a \u0111\u1ed9i tuy\u1ec3n bóng r\u1ed5.","D. <\/strong>Có m\u1ed9t s\u1ed1 ng\u01b0\u1eddi cao trên 180 cm là c\u1ea7u th\u1ee7 c\u1ee7a \u0111\u1ed9i tuy\u1ec3n bóng r\u1ed5."],"correct":"1","level":"3","hint":"","answer":"\u0110áp án \u0111úng là  A.<\/strong> M\u1ecdi c\u1ea7u th\u1ee7 trong \u0111\u1ed9i tuy\u1ec3n bóng r\u1ed5 \u0111\u1ec1u cao trên 180cm.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-08-29 15:08:03","option_type":"txt","len":3},{"id":"5254","mon_id":"1158767","chapter_id":"1158770","post_id":"6149","question":"Cách phát bi\u1ec3u nào sau \u0111ây không th\u1ec3<\/strong> dùng \u0111\u1ec3 phát bi\u1ec3u m\u1ec7nh \u0111\u1ec1 " $P \\Rightarrow Q$<\/span> " ?<\/p>","options":["A.<\/strong> N\u1ebfu P thì Q.","B. <\/strong>P kéo theo Q.","C.<\/strong> P là \u0111i\u1ec1u ki\u1ec7n \u0111\u1ee7 \u0111\u1ec3 có Q.","D. <\/strong>P là \u0111i\u1ec1u ki\u1ec7n c\u1ea7n \u0111\u1ec3 có Q."],"correct":"4","level":"3","hint":"M\u1ec7nh \u0111\u1ec1 "N\u1ebfu P thì Q" \u0111\u01b0\u1ee3c g\u1ecdi là m\u1ed9t m\u1ec7nh \u0111\u1ec1 kéo theo<\/span> và kí hi\u1ec7u là P ⇒ Q.<\/p>Các \u0111\u1ecbnh lí toán h\u1ecdc là nh\u1eefng m\u1ec7nh \u0111\u1ec1 \u0111úng và th\u01b0\u1eddng có d\u1ea1ng P ⇒ Q. Khi \u0111ó ta nói: "P là \u0111i\u1ec1u ki\u1ec7n \u0111\u1ee7<\/span> \u0111\u1ec3 có Q" ho\u1eb7c "Q là \u0111i\u1ec1u ki\u1ec7n c\u1ea7n <\/span>\u0111\u1ec3 có P".<\/p>","answer":"\u0110áp án D<\/strong> là sai vì Q m\u1edbi là \u0111i\u1ec1u ki\u1ec7n c\u1ea7n \u0111\u1ec3 có P.<\/p>\u0110áp án \u0111úng là  D. <\/strong>P là \u0111i\u1ec1u ki\u1ec7n c\u1ea7n \u0111\u1ec3 có Q.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-08-30 12:37:29","option_type":"txt","len":2}]}