Hệ bất phương trình bậc nhất hai ẩn

Home Lớp 10 Toán lớp 10 - Sách Kết nối tri thức Bài 4: Hệ bất phương trình bậc nhất hai ẩnBài tập trung bình

{"common":{"save":0,"post_id":"6078","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5295","mon_id":"1158767","chapter_id":"1158774","post_id":"6078","question":"\u0110i\u1ec3m nào sau \u0111ây không thu\u1ed9c<\/strong> mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình $ \\begin{cases}x-y>0\\\\x-3y\\le -3\\\\x+y>5\\end{cases}$<\/span><\/p>","options":["A.<\/strong> (3; 2)","B.<\/strong> (6; 3)","C.<\/strong> (6; 4)","D.<\/strong> (5; 4)"],"correct":"1","level":"2","hint":"","answer":"Xét h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình $ \\begin{cases}x-y>0\\space(I)\\\\x-3y\\le-3\\space\\space(II)\\\\x+y>5\\space(III)\\end{cases}$<\/span><\/p>A.<\/strong> (3; 2) không thu\u1ed9c<\/strong><\/span> mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình vì v\u1edbi x = 3, y = 2 không th\u1ecfa b\u1ea5t ph\u01b0\u01a1ng trình (III)<\/p>B.<\/strong> (6; 3) thu\u1ed9c<\/strong><\/span> mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình vì v\u1edbi x = 6, y = 3 th\u1ecfa mãn c\u1ea3 ba b\u1ea5t ph\u01b0\u01a1ng trình (I), (II) và (III)<\/p>C.<\/strong> (6; 4) thu\u1ed9c<\/strong> <\/span>mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình vì v\u1edbi x = 6, y = 4 th\u1ecfa mãn c\u1ea3 ba b\u1ea5t ph\u01b0\u01a1ng trình (I), (II) và (III)<\/p>D.<\/strong> (5; 4) <\/strong><\/span>thu\u1ed9c<\/strong> <\/span>mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình vì v\u1edbi x = 5, y = 4 th\u1ecfa mãn c\u1ea3 ba b\u1ea5t ph\u01b0\u01a1ng trình (I), (II) và (III)<\/p>\u0110áp án là A.<\/strong> (3; 2)<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-09-01 13:21:50","option_type":"txt","len":0},{"id":"5296","mon_id":"1158767","chapter_id":"1158774","post_id":"6078","question":"Cho h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình $\\begin{cases}\\n2x+3y-1 > 0 \\\\\\n5x-y + 4 < 0\\end{cases}$<\/span>. H\u1ecfi kh\u1eb3ng \u0111\u1ecbnh nào sau \u0111ây là sai<\/strong><\/span>?<\/p>","options":["A.<\/strong> \u0110i\u1ec3m (–2; 4) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho.","B.<\/strong> \u0110i\u1ec3m (–3; 4) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho.","C.<\/strong> \u0110i\u1ec3m (–1; 4) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho.","D.<\/strong> \u0110i\u1ec3m (0; 0) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho."],"correct":"4","level":"2","hint":"","answer":"Xét h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình $\\begin{cases}\\n2x+3y-1 > 0 \\space \\space (I) \\\\\\n5x-y + 4 < 0\\space \\space (II) \\end{cases}$<\/span><\/p>A.<\/strong> \u0110i\u1ec3m (–2; 4) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho  (\u0111úng <\/span>vì x = –2, y = 4 th\u1ecfa c\u1ea3 hai b\u1ea5t ph\u01b0\u01a1ng trình (I) và (II) )<\/p>B.<\/strong> \u0110i\u1ec3m (–3; 4) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho  (\u0111úng <\/span>vì x = –3 y = 4 th\u1ecfa c\u1ea3 hai b\u1ea5t ph\u01b0\u01a1ng trình (I) và (II) )<\/p>C.<\/strong> \u0110i\u1ec3m (–1; 4) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho  (\u0111úng <\/span>vì x = –1, y = 4 th\u1ecfa c\u1ea3 hai b\u1ea5t ph\u01b0\u01a1ng trình (I) và (II) )<\/p>D.<\/strong> \u0110i\u1ec3m (0; 0) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho   (sai <\/span>vì x = 0, y = 0 không th\u1ecfa b\u1ea5t ph\u01b0\u01a1ng trình (II) )<\/p>\u0110áp án là D.<\/strong> \u0110i\u1ec3m (0; 0) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-09-01 13:40:22","option_type":"txt","len":3},{"id":"5297","mon_id":"1158767","chapter_id":"1158774","post_id":"6078","question":"\u0110i\u1ec3m nào sau \u0111ây thu\u1ed9c mi\u1ec1n nghi\u1ec7m h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình $\\begin{cases}x+3y-2\\ge0\\\\2x+y+1\\le0\\end{cases}$<\/span>?<\/p>","options":["A.<\/strong> (1; 3)","B.<\/strong> (–1; 1)","C.<\/strong> (–1; 0)","D.<\/strong> (0; 1)"],"correct":"2","level":"2","hint":"","answer":"Xét h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình $\\begin{cases}x+3y-2\\ge0\\space (I)\\\\2x+y+1\\le0\\space (II)\\end{cases}$<\/span> <\/p>A.<\/strong> (1; 3) không thu\u1ed9c<\/span> mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình vì v\u1edbi x = 1, y = 3 không th\u1ecfa b\u1ea5t ph\u01b0\u01a1ng trình (II)<\/p>B.<\/strong> (–1; 1) thu\u1ed9c <\/span><\/strong>mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình vì v\u1edbi x = –1, y = 1 th\u1ecfa c\u1ea3 hai b\u1ea5t ph\u01b0\u01a1ng trình (I) và (II)<\/p>C.<\/strong> (–1; 0) không thu\u1ed9c<\/span> mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình vì v\u1edbi x = –1, y = 0 không th\u1ecfa b\u1ea5t ph\u01b0\u01a1ng trình (I)<\/p>D.<\/strong> (0; 1) không thu\u1ed9c<\/span> mi\u1ec1n nghi\u1ec7m c\u1ee7a h\u1ec7 b\u1ea5t ph\u01b0\u01a1ng trình vì v\u1edbi x = 0, y = 1 không th\u1ecfa b\u1ea5t ph\u01b0\u01a1ng trình (II)<\/p>\u0110áp án là  B.<\/strong> (–1; 1)<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-09-01 13:48:20","option_type":"txt","len":2}]}