Ứng dụng đạo hàm để giải quyết một số vấn đề liên quan đến thực tiễn

Home Lớp 12 Toán lớp 12 - Sách Kết nối tri thức Bài 5. Ứng dụng đạo hàm để giải quyết một số vấn đề liên quan đến thực tiễn.Bài tập trung bình

{"common":{"save":0,"post_id":"7546","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5474","post_id":"7546","mon_id":"1159285","chapter_id":"1159288","question":"S\u1ef1 \u1ea3nh h\u01b0\u1edfng khi s\u1eed d\u1ee5ng m\u1ed9t lo\u1ea1i \u0111\u1ed9c t\u1ed1 v\u1edbi vi khu\u1ea9n X \u0111\u01b0\u1ee3c m\u1ed9t nhà sinh h\u1ecdc mô t\u1ea3 b\u1eddi hàm s\u1ed1 $P(t)=\\dfrac{t+1}{t^2+t+4}$<\/span>, trong \u0111ó P(t) là s\u1ed1 l\u01b0\u1ee3ng vi khu\u1ea9n sau t (gi\u1edd) s\u1eed d\u1ee5ng \u0111\u1ed9c t\u1ed1. Vào th\u1eddi \u0111i\u1ec3m nào thì s\u1ed1 l\u01b0\u1ee3ng vi khu\u1ea9n X b\u1eaft \u0111\u1ea7u gi\u1ea3m?<\/p>","options":["A.<\/strong> Ngay t\u1eeb lúc b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng \u0111\u1ed9c t\u1ed1.","B.<\/strong> Sau 0,5 gi\u1edd.","C.<\/strong> Sau 2 gi\u1edd.","D.<\/strong> Sau 1 gi\u1edd."],"correct":"4","level":"2","hint":"S\u1eed d\u1ee5ng GTLN c\u1ee7a hàm s\u1ed1.<\/p>","answer":"Ch\u1ecdn D.<\/strong> Sau 1 gi\u1edd.<\/span><\/p>$P(t)=\\dfrac{-t^2-2t+3}{(t^2+t+4)^2}$<\/span>, $t \\ge 0$<\/span>.<\/p>$P^\\prime(t)=0$<\/span> ⇔ t = 1 (nh\u1eadn) ho\u1eb7c t = –3 (lo\u1ea1i).<\/p>B\u1ea3ng bi\u1ebfn thiên<\/p><svg height=\"200\" width=\"320\"> <g><title><\/title><rect fill=\"#d4ffaa\" height=\"202\" id=\"canvas_background\" width=\"322\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-1.5\" x2=\"319.5\" y1=\"36.25\" y2=\"36\"><\/line> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-1.5\" x2=\"319.5\" y1=\"72.25\" y2=\"72\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"39.5\" x2=\"39.5\" y1=\"-0.75\" y2=\"201.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"13.5\" xml:space=\"preserve\" y=\"23.25\">t<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"2.5\" xml:space=\"preserve\" y=\"62.25\">P'(t)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"3.5\" xml:space=\"preserve\" y=\"145.25\">P(t)<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"46.5\" xml:space=\"preserve\" y=\"23.25\">0<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"175.5\" xml:space=\"preserve\" y=\"23\">1<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"286.5\" xml:space=\"preserve\" y=\"23.25\">+<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(90 305.5,16.250000000000032) \" x=\"300.5\" xml:space=\"preserve\" y=\"23.25\">8<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"108.5\" xml:space=\"preserve\" y=\"58.25\">+<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"237.5\" xml:space=\"preserve\" y=\"47.25\">_<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_13\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"175.5\" xml:space=\"preserve\" y=\"62.25\">0<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_14\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"166.5\" xml:space=\"preserve\" y=\"95.25\">P<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"16\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"175.5\" xml:space=\"preserve\" y=\"104.25\">max<\/text> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_16\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"66.5\" x2=\"146.5\" y1=\"170.25\" y2=\"97.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_17\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-38 144.5,98.25000000000001) \" x=\"138.5\" xml:space=\"preserve\" y=\"105.25\">><\/text> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_18\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"211.5\" x2=\"279.5\" y1=\"99.25\" y2=\"168.25\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_19\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(38 278.5000000000001,166.24999999999994) \" x=\"272.5\" xml:space=\"preserve\" y=\"173.25\">><\/text> <\/g> <\/svg><\/span><\/p>Ta th\u1ea5y hàm s\u1ed1 \u0111\u1ea1t c\u1ef1c \u0111\u1ea1i t\u1ea1i t = 1 và $P^\\prime(t) < 0, \\forall t \\in (1;+\\infty)$<\/span> nên sau 1 gi\u1edd thì vi khu\u1ea9n b\u1eaft \u0111\u1ea7u gi\u1ea3m.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-08-04 01:33:28","option_type":"txt","len":2},{"id":"5479","post_id":"7546","mon_id":"1159285","chapter_id":"1159288","question":"Ông A d\u1ef1 \u0111\u1ecbnh dùng h\u1ebft 6,5 m² kính \u0111\u1ec3 làm m\u1ed9t b\u1ec3 cá có d\u1ea1ng hình h\u1ed9p ch\u1eef nh\u1eadt không n\u1eafp, chi\u1ec1u dài g\u1ea5p \u0111ôi chi\u1ec1u r\u1ed9ng (các m\u1ed1i ghép không \u0111áng k\u1ec3). B\u1ec3 cá có dung tích l\u1edbn nh\u1ea5t b\u1eb1ng bao nhiêu (k\u1ebft qu\u1ea3 làm tròn \u0111\u1ebfn hàng ph\u1ea7n tr\u0103m)?<\/p>","options":["A.<\/strong> 2,26 m³","B.<\/strong> 1,61 m³","C.<\/strong> 1,50 m³","D.<\/strong> 1,33 m³"],"correct":"3","level":"2","hint":"S\u1eed d\u1ee5ng GTLN c\u1ee7a hàm s\u1ed1.<\/p>","answer":"Ch\u1ecdn C.<\/strong> 1,50 m³.<\/span><\/p><svg height=\"200\" width=\"250\"> <g><title><\/title><rect fill=\"none\" height=\"202\" id=\"canvas_background\" width=\"252\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_10\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><rect fill=\"none\" height=\"120\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"140\" x=\"35.5\" y=\"63.25\"><\/rect> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"89.5\" x2=\"230\" y1=\"21.25\" y2=\"21\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_3\" stroke=\"#000\" stroke-dasharray=\"5,5\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"89.5\" x2=\"230\" y1=\"141.25\" y2=\"141\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_4\" stroke=\"#000\" stroke-dasharray=\"5,5\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"91\" x2=\"91\" y1=\"21\" y2=\"141\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"230\" x2=\"230\" y1=\"21\" y2=\"141\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_6\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"91\" x2=\"35\" y1=\"21.25\" y2=\"62.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_7\" stroke=\"#000\" stroke-dasharray=\"5,5\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"91\" x2=\"35\" y1=\"142.25\" y2=\"183.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_8\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"231\" x2=\"175\" y1=\"142.25\" y2=\"183.25\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"229\" x2=\"173\" y1=\"23.25\" y2=\"64.25\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" font-weight=\"bold\" id=\"svg_11\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"142.5\" xml:space=\"preserve\" y=\"15.25\">a<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" font-weight=\"bold\" id=\"svg_12\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"47.5\" xml:space=\"preserve\" y=\"40.25\">b<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"18\" font-weight=\"bold\" id=\"svg_13\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"19.5\" xml:space=\"preserve\" y=\"130.25\">c<\/text> <\/g> <\/svg><\/span><\/p>Gi\u1ea3 s\u1eed hình h\u1ed9p ch\u1eef nh\u1eadt có kích th\u01b0\u1edbc nh\u01b0 hình v\u1ebd. Ta có dung tích c\u1ee7a b\u1ec3 cá V = abc.<\/p>M\u1eb7t khác theo gi\u1ea3 thi\u1ebft ta có <\/p>$\\begin{cases}ab+2bc+2ac=6,5\\\\a=2b\\end{cases}$<\/span> ⇔ $\\begin{cases}2b^2+6bc=6,5\\\\a=2b\\end{cases}$<\/span> ⇔ $\\begin{cases}c=\\dfrac{6,5-2b^2}{6b}\\\\a=2b\\end{cases}$<\/span>.<\/p>Khi \u0111ó V = $2b^2.\\dfrac{6,5-2b^2}{6b}$<\/span> = $\\dfrac{6,5b-2b^3}{3}$<\/span>.<\/p>Xét hàm s\u1ed1 $f(b)=\\dfrac{6,5b-2b^3}{3}$<\/span> có b\u1ea3ng bi\u1ebfn thiên<\/p><svg height=\"170\" width=\"320\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g><title><\/title><rect fill=\"#fff\" height=\"172\" id=\"canvas_background\" width=\"322\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><image height=\"168\" id=\"svg_1\" stroke=\"null\" width=\"326\" x=\"-4\" 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y=\"2.5\"><\/image> <\/g> <\/svg><\/span><\/p>V\u1eady b\u1ec3 cá có dung tích l\u1edbn nh\u1ea5t là $f\\bigg(\\dfrac{\\sqrt(39)}{6}\\bigg) \\approx1,50$<\/span> m³.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-08-04 01:57:43","option_type":"txt","len":1},{"id":"5481","post_id":"7546","mon_id":"1159285","chapter_id":"1159288","question":"M\u1ed9t v\u1eadt chuy\u1ec3n \u0111\u1ed9ng theo quy lu\u1eadt $s=-\\dfrac{1}{3}t^3+6t^2$<\/span> v\u1edbi t (giây) là kho\u1ea3ng th\u1eddi gian tính t\u1eeb khi v\u1eadt b\u1eaft \u0111\u1ea7u chuy\u1ec3n \u0111\u1ed9ng và s (mét) là quãng \u0111\u01b0\u1eddng v\u1eadt di chuy\u1ec3n \u0111\u01b0\u1ee3c trong kho\u1ea3ng th\u1eddi gian \u0111ó. H\u1ecfi trong kho\u1ea3ng th\u1eddi gian 9 giây k\u1ec3 t\u1eeb khi b\u1eaft \u0111\u1ea7u chuy\u1ec3n \u0111\u1ed9ng, v\u1eadn t\u1ed1c l\u1edbn nh\u1ea5t c\u1ee7a v\u1eadt \u0111\u1ea1t \u0111\u01b0\u1ee3c b\u1eb1ng bao nhiêu?<\/p>","options":["A.<\/strong> 36 m\/s","B.<\/strong> 27 m\/s","C.<\/strong> 144 m\/s","D.<\/strong> 243 m\/s"],"correct":"1","level":"2","hint":"S\u1eed d\u1ee5ng ý ngh\u0129a c\u01a1 h\u1ecdc c\u1ee7a \u0111\u1ea1o hàm v(t) = s'(t) và GTLN c\u1ee7a hàm s\u1ed1.<\/p>","answer":"Ch\u1ecdn A.<\/strong> 36 m\/s.<\/span><\/p>Ta có v = s' = –t² + 12t ; v' = –2t + 12 ; v' = 0 ⇔ t = 6.<\/p>B\u1ea3ng bi\u1ebfn thiên<\/p><svg height=\"200\" width=\"320\"> <g> <title><\/title> <rect fill=\"none\" height=\"202\" id=\"canvas_background\" width=\"322\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-0.5\" x2=\"323.5\" y1=\"35.25\" y2=\"35.25\"><\/line> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-0.5\" x2=\"323.5\" y1=\"70.25\" y2=\"70.25\"><\/line> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"38.5\" x2=\"39\" y1=\"-0.75\" y2=\"200.25\"><\/line> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"10.5\" xml:space=\"preserve\" y=\"22.25\">t<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"8.5\" xml:space=\"preserve\" y=\"57.25\">v'<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-style=\"italic\" font-weight=\"bold\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"11.5\" xml:space=\"preserve\" y=\"133.25\">v<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_7\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"50.5\" xml:space=\"preserve\" y=\"22\">0<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_8\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"300.5\" xml:space=\"preserve\" y=\"22\">9<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_9\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"174.5\" xml:space=\"preserve\" y=\"22\">6<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_10\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"175\" xml:space=\"preserve\" y=\"56.25\">0<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_11\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"47.5\" xml:space=\"preserve\" y=\"188.25\">0<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_12\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"168.5\" xml:space=\"preserve\" y=\"93.25\">36<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_13\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"294.5\" xml:space=\"preserve\" y=\"130.25\">27<\/text> <line fill=\"none\" id=\"svg_14\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"65.5\" x2=\"157.5\" y1=\"168.25\" y2=\"101.25\"><\/line> <line fill=\"none\" id=\"svg_15\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"202.5\" x2=\"287.5\" y1=\"93.25\" y2=\"119.25\"><\/line> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_16\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-32 156.49999999999994,102.25) \" x=\"150.5\" xml:space=\"preserve\" y=\"109.25\">><\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_17\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(12 285.49999999999966,118.25000000000014) \" x=\"279.5\" xml:space=\"preserve\" y=\"125.25\">><\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_18\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"100.5\" xml:space=\"preserve\" y=\"58.25\">+<\/text> <text fill=\"#000000\" font-family=\"Times New Roman, Times, serif\" font-size=\"20\" font-weight=\"bold\" id=\"svg_19\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"237.5\" xml:space=\"preserve\" y=\"47.25\">_<\/text> <\/g> <\/svg><\/span><\/p>Nhìn b\u1ea3ng bi\u1ebfn thiên ta th\u1ea5y v\u1eadn t\u1ed1c \u0111\u1ea1t giá tr\u1ecb l\u1edbn nh\u1ea5t khi t = 6. Giá tr\u1ecb l\u1edbn nh\u1ea5t là v(6) = 36 m\/s.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-08-04 02:10:09","option_type":"txt","len":0}]}