Bất phương trình bậc nhất hai ẩn

Home Lớp 10 Toán lớp 10 - Sách Kết nối tri thức Bài 3: Bất phương trình bậc nhất hai ẩnBài tập trung bình

{"common":{"save":0,"post_id":"6075","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5293","mon_id":"1158767","chapter_id":"1158774","post_id":"6075","question":"Trong các b\u1ea5t ph\u01b0\u01a1ng trình d\u01b0\u1edbi \u0111ây, b\u1ea5t ph\u01b0\u01a1ng trình nào là b\u1ea5t ph\u01b0\u01a1ng trình b\u1eadc nh\u1ea5t hai \u1ea9n?<\/p>","options":["A.<\/strong> $3x+5y-3z \\le 0$<\/span>","B.<\/strong> $3x^2-6y<0$<\/span>","C.<\/strong> $-4x+5y^2>0$<\/span>","D.<\/strong> $10x - y + 5 \\ge 0$<\/span>"],"correct":"4","level":"2","hint":"B\u1ea5t ph\u01b0\u01a1ng trình b\u1eadc nh\u1ea5t hai \u1ea9n x, y có d\u1ea1ng t\u1ed5ng quát là<\/p>$ax+by+c \\le 0$<\/span>   ($ax+by+c \\ge 0$<\/span> , $ax+by+c<0$<\/span> , $ax+by+c>0$<\/span> )<\/p>trong \u0111ó a, b, c là các s\u1ed1 th\u1ef1c \u0111ã cho, a và b không \u0111\u1ed3ng th\u1eddi b\u1eb1ng 0, x và y là các \u1ea9n s\u1ed1).<\/p>","answer":"A.<\/strong> $3x+5y-3z \\le 0$<\/span>   (sai<\/span>, 3 \u1ea9n x, y, z)<\/p>B.<\/strong> $3x^2-6y<0$<\/span>  (sai<\/span>, ch\u1ee9a x²)<\/p>C.<\/strong> $-4x+5y^2>0$<\/span>  (sai<\/span>, ch\u1ee9a y²)<\/p>D.<\/strong> $10x - y + 5 \\ge 0$<\/span>  (\u0111úng<\/span>)<\/p>\u0110áp án \u0111úng là   D.<\/strong> $10x - y + 5 \\ge 0$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-09-01 13:05:54","option_type":"math","len":0},{"id":"5294","mon_id":"1158767","chapter_id":"1158774","post_id":"6075","question":"Nh\u1eefng \u0111i\u1ec3m nào sau \u0111ây thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng trình  $2x+y-3 \\ge 0$<\/span><\/p>","options":["A. <\/strong>$Q(-1;-3)$<\/span>","B. <\/strong>$M \\left( \\dfrac{3}{2};-1 \\right)$<\/span>","C. <\/strong>$N \\left( \\dfrac{3}{2} ; 0 \\right)$<\/span>","D.<\/strong> $P (0 ; 3)$<\/span>"],"correct":"[\"3\",\"4\"]","level":"2","hint":"Thay x, y c\u1ee7a các \u0111i\u1ec3m trên l\u1ea7n l\u01b0\u1ee3t vào b\u1ea5t ph\u01b0\u01a1ng trình $2x+y-3 \\ge 0$<\/span><\/p>","answer":"Thay x, y c\u1ee7a các \u0111i\u1ec3m trên l\u1ea7n l\u01b0\u1ee3t vào b\u1ea5t ph\u01b0\u01a1ng trình $2x+y-3 \\ge 0$<\/span><\/p>A. <\/strong>$Q(-1;-3)$<\/span>   (không thu\u1ed9c<\/span>, vì  $2.(-1)+(-3) - 3 = -8 < 0$<\/span>  )<\/p>B. <\/strong>$M \\left( \\dfrac{3}{2};-1 \\right)$<\/span>   (không thu\u1ed9c<\/span>, vì  $2. \\dfrac{3}{2}+(-1)-3-1<0$<\/span>  )<\/p>C. <\/strong>$N \\left( \\dfrac{3}{2} ; 0 \\right)$<\/span>  (thu\u1ed9c<\/span>, vì  $2 .\\dfrac{3}{2} + 0 - 3 = 0$<\/span> )<\/p>D.<\/strong> $P (0 ; 3)$<\/span>  (thu\u1ed9c<\/span>, vì  $2 . 0 + 3 - 3 = 0$<\/span>  )<\/p>Các \u0111áp án \u0111úng là   C. <\/strong>$N \\left( \\dfrac{3}{2} ; 0 \\right)$<\/span> <\/span> và    D.<\/strong> $P (0 ; 3)$<\/span><\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","user_id":"131","test":"0","date":"2022-09-01 13:17:39","option_type":"math","len":0},{"id":"5300","mon_id":"1158767","chapter_id":"1158774","post_id":"6075","question":"Hình v\u1ebd nào sau \u0111ây bi\u1ec3u di\u1ec5n mi\u1ec1n nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng trình  $3x-2y>-6$<\/span> ?<\/p>","options":["A.<\/strong> <svg height=\"140\" width=\"220\"> <g>\n<title><\/title>\n<rect fill=\"#fff\" height=\"142\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_8\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<ellipse cx=\"94.5\" cy=\"46.75\" fill=\"#ff0000\" id=\"svg_5\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"142.5\" cy=\"109.75\" fill=\"#ff0000\" id=\"svg_6\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(-0.37100765109062195 110.5000076293987,67.25000762939558) \" x1=\"50.5071\" x2=\"170.4929\" y1=\"-10.941\" y2=\"145.44101\"><\/line> <rect fill=\"#4c4c4c\" height=\"258.33211\" id=\"svg_23\" opacity=\"0.5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(-38 43.871311187744126,116.25788879394533) \" width=\"166\" x=\"-39.12869\" y=\"-12.90817\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_25\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"203.5\" xml:space=\"preserve\" y=\"67.25\">x<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_26\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"152.5\" xml:space=\"preserve\" y=\"12.25\">y<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_27\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"151.5\" xml:space=\"preserve\" y=\"116.25\">-3<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_28\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"96.5\" xml:space=\"preserve\" y=\"41.25\">-2<\/text> <g id=\"svg_9\"> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"143\" x2=\"142.5\" y1=\"-4.75\" y2=\"145.24999\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-90 144.51040649414065,4.249999999999987) \" x=\"137.5\" xml:space=\"preserve\" y=\"12.25\">><\/text> <\/g> <g id=\"svg_10\"> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-7.49999\" x2=\"240\" y1=\"46.25\" y2=\"46.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"206.5\" xml:space=\"preserve\" y=\"54.25\">><\/text> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"145.5\" xml:space=\"preserve\" y=\"42.25\">O<\/text> <\/g> <\/svg><\/span>","B. <\/strong><svg height=\"140\" width=\"220\"> <g>\n<title><\/title>\n<rect fill=\"#fff\" height=\"142\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_8\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<ellipse cx=\"122.5\" cy=\"38.75\" fill=\"#ff0000\" id=\"svg_5\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"88.5\" cy=\"95.75\" fill=\"#ff0000\" id=\"svg_6\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"152.5\" x2=\"55.5\" y1=\"-4.75\" y2=\"148.25\"><\/line> <rect fill=\"#4c4c4c\" height=\"231.48999\" id=\"svg_23\" opacity=\"0.5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(32 172.13414001464858,123.83383178710933) \" width=\"166\" x=\"89.13414\" y=\"8.08883\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_25\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"208.5\" xml:space=\"preserve\" y=\"110.25\">x<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_26\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"102.5\" xml:space=\"preserve\" y=\"13.25\">y<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_27\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"103.5\" xml:space=\"preserve\" y=\"45.25\">3<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_28\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"73.5\" xml:space=\"preserve\" y=\"85.25\">-2<\/text> <g id=\"svg_9\"> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"122\" x2=\"121.5\" y1=\"-4.75\" y2=\"145.24999\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-90 123.51041412353516,4.250000000000001) \" x=\"116.5\" xml:space=\"preserve\" y=\"12.25\">><\/text> <\/g> <g id=\"svg_10\"> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-7.49999\" x2=\"240\" y1=\"95.25\" y2=\"95.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"206.5\" xml:space=\"preserve\" y=\"103.25\">><\/text> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"127.5\" xml:space=\"preserve\" y=\"111.25\">O<\/text> <\/g> <\/svg><\/span>","C.<\/strong> <svg height=\"140\" width=\"220\"> <g>\n<title><\/title>\n<rect fill=\"#fff\" height=\"142\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_8\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<ellipse cx=\"122.5\" cy=\"38.75\" fill=\"#ff0000\" id=\"svg_5\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"88.5\" cy=\"95.75\" fill=\"#ff0000\" id=\"svg_6\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"152.5\" x2=\"55.5\" y1=\"-4.75\" y2=\"148.25\"><\/line> <rect fill=\"#4c4c4c\" height=\"231.48999\" id=\"svg_23\" opacity=\"0.5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(32 34.13412475585938,25.833824157714844) \" width=\"166\" x=\"-48.86586\" y=\"-89.91117\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_25\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"208.5\" xml:space=\"preserve\" y=\"110.25\">x<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_26\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"108.5\" xml:space=\"preserve\" y=\"20.25\">y<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_27\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"133.5\" xml:space=\"preserve\" y=\"48.25\">3<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_28\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"86.5\" xml:space=\"preserve\" y=\"113.25\">-2<\/text> <g id=\"svg_9\"> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"122\" x2=\"121.5\" y1=\"-4.75\" y2=\"145.24999\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-90 123.51041412353516,4.250000000000001) \" x=\"116.5\" xml:space=\"preserve\" y=\"12.25\">><\/text> <\/g> <g id=\"svg_10\"> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-7.49999\" x2=\"240\" y1=\"95.25\" y2=\"95.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"206.5\" xml:space=\"preserve\" y=\"103.25\">><\/text> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"127.5\" xml:space=\"preserve\" y=\"111.25\">O<\/text> <\/g> <\/svg><\/span>","D.<\/strong> <svg height=\"140\" width=\"220\"> <g>\n<title><\/title>\n<rect fill=\"#fff\" height=\"142\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_8\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<ellipse cx=\"73.5\" cy=\"38.75\" fill=\"#ff0000\" id=\"svg_5\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"112.5\" cy=\"95.75\" fill=\"#ff0000\" id=\"svg_6\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(-0.37100765109062195 92.00000762939604,67.24999999999989) \" x1=\"38.50696\" x2=\"145.49304\" y1=\"-10.89891\" y2=\"145.39892\"><\/line> <rect fill=\"#4c4c4c\" height=\"231.48999\" id=\"svg_23\" opacity=\"0.5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(-35 23.134140014648462,114.83382415771483) \" width=\"166\" x=\"-59.86586\" y=\"-0.91117\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_25\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"208.5\" xml:space=\"preserve\" y=\"110.25\">x<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_26\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"57.5\" xml:space=\"preserve\" y=\"13.25\">y<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_27\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"79.5\" xml:space=\"preserve\" y=\"41.25\">3<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_28\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"112.5\" xml:space=\"preserve\" y=\"86.25\">2<\/text> <g id=\"svg_9\"> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"73\" x2=\"72.5\" y1=\"-4.75\" y2=\"145.24999\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-90 74.51041412353517,4.249999999999994) \" x=\"67.5\" xml:space=\"preserve\" y=\"12.25\">><\/text> <\/g> <g id=\"svg_10\"> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-7.49999\" x2=\"240\" y1=\"95.25\" y2=\"95.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"206.5\" xml:space=\"preserve\" y=\"103.25\">><\/text> <\/g> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"55.5\" xml:space=\"preserve\" y=\"110.25\">O<\/text> <\/g> <\/svg><\/span>"],"correct":"3","level":"2","hint":"","answer":"V\u1ebd \u0111\u01b0\u1eddng th\u1eb3ng  $(d) : 3x - 2y = -6$<\/span> .<\/p>Ta th\u1ea5y   (0 ; 0) thu\u1ed9c mi\u1ec1n nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho  (vì  3 . 0 – 2 . 0  > –6 là \u0111úng). <\/p>V\u1eady mi\u1ec1n nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng trình \u0111ã cho là n\u1eeda m\u1eb7t ph\u1eb3ng b\u1edd  $(d)$<\/span>  ch\u1ee9a  g\u1ed1c t\u1ecda \u0111\u1ed9 (0 ; 0)  không k\u1ec3 \u0111\u01b0\u1eddng th\u1eb3ng $(d)$<\/span>  (ph\u1ea7n không b\u1ecb tô màu xám)  (hình v\u1ebd).<\/p><svg height=\"140\" width=\"220\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"142\" id=\"canvas_background\" width=\"222\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_8\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <ellipse cx=\"122.5\" cy=\"38.75\" fill=\"#ff0000\" id=\"svg_5\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"88.5\" cy=\"95.75\" fill=\"#ff0000\" id=\"svg_6\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <line fill=\"none\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"152.5\" x2=\"55.5\" y1=\"-4.75\" y2=\"148.25\"><\/line> <rect fill=\"#4c4c4c\" height=\"231.48999\" id=\"svg_23\" opacity=\"0.5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(32 34.13412475585938,25.833824157714844) \" width=\"166\" x=\"-48.86586\" y=\"-89.91117\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_25\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" 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