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{"id":5900,"date":"2016-10-07T02:28:33","date_gmt":"2016-10-07T02:28:33","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=5900"},"modified":"2016-10-07T02:28:33","modified_gmt":"2016-10-07T02:28:33","slug":"7-bi-quyet-day-tap-tot-de-thi-trac-nghiem-mon-toan-thpt-quoc-gia","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/7-bi-quyet-day-tap-tot-de-thi-trac-nghiem-mon-toan-thpt-quoc-gia\/","title":{"rendered":"7 b\u00ed quy\u1ebft d\u1ea1y, \u00f4n t\u1eadp t\u1ed1t \u0111\u1ec1 thi tr\u1eafc nghi\u1ec7m m\u00f4n To\u00e1n THPT qu\u1ed1c gia"},"content":{"rendered":"

Nh\u1eadn \u0111\u1ecbnh v\u1ec1 \u0111\u1ec1 thi minh h\u1ecda To\u00e1n THPT qu\u1ed1c gia, Ti\u1ebfn s\u0129 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y to\u00e1n L\u00ea Th\u1ed1ng Nh\u1ea5t cho bi\u1ebft, t\u1ef7 l\u1ec7 c\u00e1c c\u00e2u ki\u1ec3m tra ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u1edf m\u1ee9c \u0111\u1ed9 cho m\u1ee5c ti\u00eau t\u1ed1t nghi\u1ec7p THPT nhi\u1ec1u h\u01a1n nh\u1eefng c\u00e2u \u0111\u00f2i h\u1ecfi v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c nh\u1eb1m t\u1edbi vi\u1ec7c d\u00f9ng k\u1ebft qu\u1ea3 \u0111\u1ec3 tuy\u1ec3n sinh \u0111\u1ea1i h\u1ecdc.<\/h4>\n
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\"\n\u0110\u1ec1<\/div>\n
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\u0110\u1ec1 thi minh h\u1ecda m\u00f4n To\u00e1n THPT qu\u1ed1c gia d\u00e0nh nhi\u1ec1u ki\u1ebfn th\u1ee9c cho t\u1ed1t nghi\u1ec7p nhi\u1ec1u h\u01a1n x\u00e9t tuy\u1ec3n \u0110H<\/p>\n<\/div>\n<\/div>\n

Th\u1eddi gian 1,8 ph\u00fat\/c\u00e2u<\/strong><\/p>\n

Theo Ti\u1ebfn s\u0129 Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y to\u00e1n L\u00ea Th\u1ed1ng Nh\u1ea5t chia s\u1ebb t\u1ea1i BigSchool, v\u1edbi \u01b0u th\u1ebf v\u1ec1 s\u1ed1 c\u00e2u \u1edf h\u00ecnh th\u1ee9c tr\u1eafc nghi\u1ec7m n\u00ean c\u00e1c ki\u1ebfn th\u1ee9c to\u00e1n l\u1edbp 12 c\u00f3 trong \u0111\u1ec1 \u0111\u01b0\u1ee3c ph\u1ee7 r\u1ed9ng h\u01a1n so v\u1edbi \u0111\u1ec1 t\u1ef1 lu\u1eadn. M\u1eb7t kh\u00e1c, v\u1edbi 50 c\u00e2u n\u00ean c\u00e1c d\u1ea1ng b\u00e0i c\u00f3 t\u00ednh \u201c\u0111\u00e1nh \u0111\u1ed1\u201d \u0111\u00e3 kh\u00f4ng xu\u1ea5t hi\u1ec7n m\u00e0 t\u1ea5t c\u1ea3 \u0111\u1ec1u l\u00e0 c\u00e1c c\u00e2u li\u00ean quan t\u1edbi c\u00e1c ki\u1ebfn th\u1ee9c to\u00e1n c\u01a1 b\u1ea3n trong ch\u01b0\u01a1ng tr\u00ecnh t\u1eeb m\u1ee9c \u0111\u1ed9 ki\u1ec3m tra ki\u1ebfn th\u1ee9c t\u1edbi m\u1ee9c \u0111\u1ed9 v\u1eadn d\u1ee5ng s\u1ef1 hi\u1ec3u bi\u1ebft.<\/p>\n

T\u1ef7 l\u1ec7 c\u00e1c c\u00e2u ki\u1ec3m tra ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u1edf m\u1ee9c \u0111\u1ed9 cho m\u1ee5c ti\u00eau t\u1ed1t nghi\u1ec7p THPT nhi\u1ec1u h\u01a1n nh\u1eefng c\u00e2u \u0111\u00f2i h\u1ecfi v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c nh\u1eb1m t\u1edbi vi\u1ec7c d\u00f9ng k\u1ebft qu\u1ea3 \u0111\u1ec3 tuy\u1ec3n sinh \u0111\u1ea1i h\u1ecdc (\u0111\u1ed1i v\u1edbi nh\u1eefng tr\u01b0\u1eddng kh\u00f4ng \u0111\u00f2i h\u1ecfi cao v\u1ec1 n\u0103ng l\u1ef1c to\u00e1n h\u1ecdc).<\/p>\n

C\u1ea5u tr\u00fac \u0111\u1ec1 thi c\u00f3 th\u1ec3 th\u1ea5y g\u1ed3m 7 n\u1ed9i dung \u0111\u00fang theo 7 ch\u01b0\u01a1ng trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 12, v\u1edbi m\u1ed7i n\u1ed9i dung \u0111\u01b0\u1ee3c s\u1eafp th\u1ee9 t\u1ef1 theo m\u1ee9c \u0111\u1ed9 cao d\u1ea7n \u0111\u1ec3 h\u1ecdc sinh c\u00f3 th\u1ec3 d\u1ec5 l\u1ef1a ch\u1ecdn nhanh v\u1ec1 th\u1ee9 t\u1ef1 l\u00e0m c\u00e1c c\u00e2u d\u1ec5 \u1edf t\u1eebng n\u1ed9i dung.<\/p>\n

\u1ede \u0111\u00e2y c\u0169ng c\u1ea7n nh\u1eafc l\u1ea1i th\u1eddi gian trung b\u00ecnh d\u00e0nh cho m\u1ed7i c\u00e2u, k\u1ec3 c\u1ea3 \u0111\u1ecdc c\u00e2u h\u1ecfi, nh\u1edb l\u1ea1i ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u00e0 th\u1ef1c hi\u1ec7n vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n d\u00f9 l\u00e0 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y t\u00ednh c\u1ea7m tay hay ki\u1ec3m th\u1eed c\u00e1c \u0111\u00e1p \u00e1n s\u1ebd ch\u1ec9 l\u00e0 1,8 ph\u00fat \u0111\u1ec1u \u0111\u00f2i h\u1ecfi t\u1ed1c \u0111\u1ed9 cao c\u1ee7a h\u1ecdc sinh khi t\u00e1i hi\u1ec7n ki\u1ebfn th\u1ee9c hay quy\u1ebft \u0111\u1ecbnh h\u01b0\u1edbng l\u00e0m b\u00e0i.<\/p>\n

Ti\u1ebfn s\u0129 Nh\u1ea5t \u0111\u00e3 \u0111\u01b0a ra 7 l\u01b0u \u00fd khi \u00f4n t\u1eadp m\u00f4n To\u00e1n tr\u1eafc nghi\u1ec7m nh\u01b0 sau:<\/strong><\/p>\n

1. C\u00e1c c\u00e2u tr\u1ef1c ti\u1ebfp s\u1eed d\u1ee5ng m\u00e1y t\u00ednh c\u1ea7m tay \u0111\u1ec3 \u0111i \u0111\u1ebfn k\u1ebft qu\u1ea3 chi\u1ebfm kho\u1ea3ng 1\/3 s\u1ed1 c\u00e2u trong \u0111\u1ec1 n\u00e0y. C\u00e1c c\u00e2u n\u00e0y tuy kh\u00f4ng c\u1ea7n quan t\u00e2m t\u1edbi c\u00e1c b\u01b0\u1edbc gi\u1ea3i nh\u01b0ng h\u1ecdc sinh v\u1eabn c\u1ea7n bi\u1ebft kh\u00e1i ni\u1ec7m \u0111\u1ec3 nh\u1eadn d\u1ea1ng v\u00e0 th\u1ef1c hi\u1ec7n vi\u1ec7c s\u1eed d\u1ee5ng m\u00e1y t\u00ednh c\u1ea7m tay th\u00e0nh th\u1ea1o. Nh\u01b0 v\u1eady, vi\u1ec7c \u00f4n t\u1eadp thi tr\u1eafc nghi\u1ec7m m\u00f4n to\u00e1n kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf vi\u1ec7c luy\u1ec7n t\u1eadp k\u0129 n\u0103ng s\u1eed d\u1ee5ng m\u00e1y t\u00ednh c\u1ea7m tay.<\/p>\n

2. Khi d\u1ea1y cho h\u1ecdc sinh, c\u00e1c th\u1ea7y c\u00f4 c\u1ea7n ph\u00e2n t\u00edch nh\u1eefng sai l\u1ea7m hay g\u1eb7p ph\u1ea3i \u0111\u1ec3 h\u1ecdc sinh tr\u00e1nh \u0111\u01b0\u1ee3c nh\u1eefng \u0111\u00e1p \u00e1n c\u00f3 t\u00ednh ch\u1ea5t \u201cb\u1eaby\u201d h\u1ecdc sinh v\u00e0o l\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n sai. Vi\u1ec7c \u0111\u1ecdc hi\u1ec3u c\u00e1c \u0111\u00e1p \u00e1n l\u00e0 vi\u1ec7c c\u0169ng c\u1ea7n r\u00e8n luy\u1ec7n cho h\u1ecdc sinh. Th\u1ea7y c\u00f4 c\u1ea7n c\u00f3 nh\u1eefng di\u1ec5n \u0111\u1ea1t kh\u00e1c nhau v\u1ec1 c\u00e1c m\u1ec7nh \u0111\u1ec1, c\u00e1c k\u1ebft lu\u1eadn c\u1ee7a b\u00e0i to\u00e1n \u0111\u1ec3 ch\u1ec9 ra nh\u1eefng c\u00e1ch hi\u1ec3u sai v\u1ec1 c\u00e1c kh\u00e1i ni\u1ec7m to\u00e1n.<\/p>\n

3. Kh\u00f4ng nh\u1eefng d\u1ea1y k\u0129 t\u1eebng kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n, th\u1ea7y c\u00f4 c\u1ea7n d\u1ea1y cho h\u1ecdc sinh nh\u1eefng \u0111i\u1ec1u kh\u00e1i qu\u00e1t khi h\u1ecdc xong c\u00e1c v\u1ea5n \u0111\u1ec1. Ngo\u00e0i vi\u1ec7c d\u1ea1y t\u1eebng lo\u1ea1i h\u00e0m s\u1ed1 v\u1edbi c\u00e1c d\u1ea1ng \u0111\u1ed3 th\u1ecb c\u1ee7a m\u1ed7i lo\u1ea1i h\u00e0m s\u1ed1 n\u00e0y, c\u1ea7n t\u1ed5ng k\u1ebft \u0111\u1ec3 so s\u00e1nh \u0111\u1ed1i chi\u1ebfu. Ch\u1eb3ng h\u1ea1n v\u1edbi c\u00e2u 1 th\u00ec khi h\u1ecdc sinh n\u1eafm \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1i qu\u00e1t n\u00e0y c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf ngay c\u00e1c \u0111\u00e1p \u00e1n A, B, C v\u00ec c\u00e1c h\u00e0m s\u1ed1 n\u00e0y kh\u00f4ng th\u1ec3 c\u00f3 d\u1ea1ng \u0111\u1ed3 th\u1ecb nh\u01b0 \u0111\u00e3 cho n\u00ean ch\u1ecdn ngay \u0111\u00e1p \u00e1n D m\u00e0 kh\u00f4ng c\u1ea7n t\u00ednh \u0111\u1ea1o h\u00e0m h\u00e0m s\u1ed1 n\u00e0y, t\u1ed1c \u0111\u1ed9 l\u00e0m b\u00e0i ch\u1eafc ch\u1eafn s\u1ebd nhanh h\u01a1n.<\/p>\n

4. V\u1ec1 m\u1ee9c \u0111\u1ed9 c\u00e1c d\u1ea1ng to\u00e1n li\u00ean quan t\u1edbi m\u1ed9t kh\u00e1i ni\u1ec7m, th\u1ea7y c\u00f4 c\u1ea7n xu\u1ea5t ph\u00e1t t\u1eeb th\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n, \u0111\u01a1n thu\u1ea7n l\u00e0 \u00e1p d\u1ee5ng \u0111\u1ecbnh ngh\u0129a, nh\u01b0ng c\u0169ng ti\u1ebfn t\u1edbi c\u00e1c th\u00ed d\u1ee5 \u0111\u00f2i h\u1ecfi hi\u1ec3u kh\u00e1i ni\u1ec7m h\u01a1n, \u0111\u01b0a ra b\u00e0i to\u00e1n \u0111\u1ec3 h\u1ecdc sinh tr\u00e1nh hi\u1ec3u sai v\u1ec1 kh\u00e1i ni\u1ec7m. Ch\u1eb3ng h\u1ea1n v\u1edbi c\u00e2u 2 ch\u1ec9 c\u1ea7n h\u1ecdc sinh \u00e1p d\u1ee5ng \u0111\u1ecbnh ngh\u0129a v\u1ec1 \u0111\u01b0\u1eddng ti\u1ec7m ngang nh\u01b0ng t\u1edbi c\u00e2u 9 th\u00ec \u0111\u00f2i h\u1ecfi ph\u1ea3i hi\u1ec3u h\u01a1n v\u00e0 v\u1eadn d\u1ee5ng t\u1ed1t h\u01a1n v\u1ec1 kh\u00e1i ni\u1ec7m.<\/p>\n

5. Khi d\u1ea1y m\u1ed9t lo\u1ea1i to\u00e1n, th\u1ea7y c\u00f4 c\u1ea7n d\u1ea1y nh\u1eefng c\u00e1ch gi\u1ea3i kh\u00e1c nhau \u0111\u1ec3 khi g\u1eb7p c\u00e1c t\u00ecnh hu\u1ed1ng trong \u0111\u1ec1 thi h\u1ecdc sinh c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn c\u00e1ch l\u00e0m n\u00e0o nhanh nh\u1ea5t tu\u1ef3 theo c\u00e1c ph\u01b0\u01a1ng \u00e1n m\u00e0 \u0111\u1ec1 thi \u0111\u01b0a ra .<\/p>\n

6. Ngo\u00e0i vi\u1ec7c d\u1ea1y h\u1ecdc sinh l\u00e0m c\u00e1c b\u00e0i to\u00e1n v\u1edbi nh\u1eefng con s\u1ed1 c\u1ee5 th\u1ec3, c\u00e1c th\u1ea7y c\u00f4 c\u1ea7n d\u1ea1y c\u1ea3 nh\u1eefng b\u00e0i to\u00e1n c\u00f3 t\u00ednh t\u1ed5ng qu\u00e1t v\u00e0 ghi nh\u1edb k\u1ebft qu\u1ea3 t\u1ed5ng qu\u00e1t. Ch\u1eb3ng h\u1ea1n b\u00e0i to\u00e1n t\u1ed5ng qu\u00e1t d\u1ec5 nh\u1ea5t c\u1ee7a c\u00e2u 10 l\u00e0 cho t\u1ea5m kim lo\u1ea1i h\u00ecnh vu\u00f4ng c\u00f3 c\u1ea1nh l\u00e0 a (\u0111.v.\u0111.d) v\u00e0 ng\u01b0\u1eddi ta c\u1eaft \u0111i \u1edf 4 g\u00f3c c\u00e1c h\u00ecnh vu\u00f4ng c\u1ea1nh x (\u0111.v.\u0111.d) \u0111\u1ec3 g\u1ea5p th\u00e0nh c\u00e1i h\u1ed9p kh\u00f4ng n\u1eafp (a > 2x). X\u00e1c \u0111\u1ecbnh x \u0111\u1ec3 th\u1ec3 t\u00edch h\u00ecnh h\u1ed9p l\u1edbn nh\u1ea5t. Th\u1ec3 t\u00edch V = x(a \u2013 2x)(a- 2x) (\u0111.v.d.t). B\u00e0i to\u00e1n n\u00e0y c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng b\u1ea5t \u0111\u1eb3ng th\u1ee9c C\u00f4 \u2013 si ho\u1eb7c x\u00e9t h\u00e0m s\u1ed1 s\u1ebd c\u00f3 ngay k\u1ebft qu\u1ea3 V l\u1edbn nh\u1ea5t khi x = a\/6 . V\u1eady khi g\u1eb7p b\u00e0i c\u1ee5 th\u1ec3 nh\u01b0 c\u00e2u 10 h\u1ecdc sinh th\u1ea5y ngay x = 2 n\u00ean ch\u1ecdn \u0111\u00e1p \u00e1n C. C\u00f3 th\u1ec3 t\u1ed5ng qu\u00e1t kh\u00f3 h\u01a1n l\u00e0 t\u1ea5m kim lo\u1ea1i ban \u0111\u1ea7u l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt.<\/p>\n

7. Khi d\u1ea1y c\u00e1c kh\u00e1i ni\u1ec7m to\u00e1n h\u1ecdc th\u1ea7y c\u00f4 c\u1ea7n ph\u00e2n t\u00edch \u00fd ngh\u0129a h\u00ecnh h\u1ecdc ho\u1eb7c \u00fd ngh\u0129 v\u1eadt l\u00fd n\u1ebfu c\u00f3 c\u1ee7a kh\u00e1i ni\u1ec7m v\u00e0 quay l\u1ea1i c\u00e1c \u00fd ngh\u0129a n\u00e0y khi h\u1ecdc th\u00eam c\u00e1c kh\u00e1i ni\u1ec7m kh\u00e1c. Ch\u1eb3ng h\u1ea1n khi h\u1ecdc kh\u00e1i ni\u1ec7m \u0111\u1ea1o h\u00e0m t\u1ea1i m\u1ed9t \u0111i\u1ec3m, th\u1ea7y c\u00f4 nh\u1ea5n m\u1ea1nh \u00fd ngh\u0129a v\u1eadt l\u00fd v\u00e0 \u00fd ngh\u0129a h\u00ecnh h\u1ecdc nh\u01b0ng khi h\u1ecdc xong kh\u00e1i ni\u1ec7m nguy\u00ean h\u00e0m c\u1ea7n quay tr\u1edf l\u1ea1i v\u1ea5n \u0111\u1ec1 n\u00e0y. N\u1ebfu tr\u01b0\u1edbc \u0111\u00e2y cho h\u00e0m S = f(t) v\u1edbi S (\u0111.v.\u0111.d) l\u00e0 qu\u00e3ng \u0111\u01b0\u1eddng \u0111i \u0111\u01b0\u1ee3c t\u1ea1i th\u1eddi \u0111i\u1ec3m t (\u0111.v.t.g) th\u00ec S\u2019 = f\u2019(t) (\u0111.v.v.t) ch\u00ednh l\u00e0 v\u1eadn t\u1ed1c c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng t\u1ea1i th\u1eddi \u0111i\u1ec3m t (\u0111.v.t.g).<\/p>\n

\u201cT\u00f4i hy v\u1ecdng c\u00e1c th\u1ea7y c\u00f4 hi\u1ec3u \u0111\u00fang v\u1ec1 d\u1ea1y thi tr\u1eafc nghi\u1ec7m m\u00f4n to\u00e1n. Kh\u00f4ng ph\u1ea3i ch\u00fang ta b\u1ecf qua \u0111\u01b0\u1ee3c nh\u1eefng g\u00ec m\u00e0 khi d\u1ea1y thi t\u1ef1 lu\u1eadn ch\u00fang ta \u0111\u00e3 th\u1ef1c hi\u1ec7n m\u00e0 ch\u00fang ta v\u1eabn ph\u1ea3i d\u1ea1y th\u1eadt k\u1ef9 c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n. Qua \u0111\u00f3, c\u00e1c b\u1ea1n h\u1ecdc sinh l\u1edbp 12 c\u00f3 \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y c\u0169ng c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c v\u1ec1 c\u00e1ch h\u1ecdc c\u1ee7a m\u00ecnh \u0111\u1ec3 kh\u00f4ng hoang mang v\u1edbi h\u00ecnh th\u1ee9c thi m\u1edbi\u201d – TS L\u00ea Th\u1ed1ng Nh\u1ea5t nh\u1ea5n m\u1ea1nh.<\/p>\n

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Th\u1ea1c S\u0129 Ng\u00f4 Thanh S\u01a1n ( T\u1ed5 Tr\u01b0\u1edfng T\u1ed5 To\u00e1n THPT V\u0129nh Vi\u1ec5n, TPHCM ): \u0110\u1ec1 minh h\u1ecda ra gi\u00e0n tr\u1ea3i kh\u1eafp c\u1ea3 ch\u01b0\u01a1ng tr\u00ecnh 12, ra c\u1ea3 v\u00e0o c\u00e1c ph\u1ea7n m\u00e0 tr\u01b0\u1edbc \u0111\u00e2y c\u00e1c gi\u00e1o vi\u00ean d\u1ea1y qua loa, th\u1eadm ch\u00ed l\u1edd \u0111i kh\u00f4ng d\u1ea1y<\/p>\n

Nh\u00ecn chung, \u0111\u1ec1 thi n\u1eb1m trong ch\u01b0\u01a1ng tr\u00ecnh l\u1edbp 12. \u0110\u1ec1 thi ra bao qu\u00e1t c\u1ea3 ch\u01b0\u01a1ng tr\u00ecnh 12, c\u00e1c c\u00e2u h\u1ecfi \u0111a ph\u1ea7n l\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u1ecf, ph\u1ee7 k\u00edn kh\u1eafp c\u00e1c ch\u1ee7 \u0111\u1ec1 trong ch\u01b0\u01a1ng tr\u00ecnh. T\u1eeb \u0111\u00f3 ki\u1ec3m tra \u0111\u01b0\u1ee3c nh\u1eefng ph\u1ea7n ki\u1ebfn th\u1ee9c m\u00e0 trong \u0111\u1ec1 thi t\u1ef1 lu\u1eadn tr\u01b0\u1edbc \u0111\u00e2y ch\u01b0a t\u1eebng ra thi.<\/p>\n

\u0110\u1ec1 thi c\u00f3 5 c\u00e2u c\u00f3 nh\u1eefng \u0111\u1ed3 th\u1ecb, b\u1ea3ng bi\u1ebfn thi\u00ean, h\u00ecnh v\u1ebd (c\u00e2u 1, c\u00e2u 4, c\u00e2u 10, c\u00e2u 31, c\u00e2u 40) m\u00e0 h\u1ecdc sinh ph\u1ea3i d\u1ef1a v\u00e0o \u0111\u00f3 \u0111\u1ec3 l\u1ea5y th\u00f4ng tin t\u1eeb \u0111\u00f3 m\u1edbi tr\u1ea3 l\u1eddi \u0111\u01b0\u1ee3c c\u00e2u h\u1ecfi. \u0110\u1ec1 thi c\u00f3 nh\u1eefng c\u00e2u h\u1ecfi \u1ee9ng d\u1ee5ng to\u00e1n \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1: b\u00e0i to\u00e1n gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t c\u00f3 d\u00f9ng \u0111\u1ebfn h\u00ecnh v\u1ebd minh h\u1ecda (c\u00e2u 10), b\u00e0i to\u00e1n l\u00e3i su\u1ea5t (c\u00e2u 21), b\u00e0i to\u00e1n \u1ee9ng d\u1ee5ng c\u1ee7a m\u00f4n v\u1eadt l\u00fd (c\u00e2u 24).<\/p>\n

C\u00f3 c\u00e2u h\u1ecfi thu\u1ea7n t\u00fay l\u00e0 l\u00fd thuy\u1ebft trong s\u00e1ch gi\u00e1o khoa (c\u00e2u 22). C\u00f3 nh\u1eefng c\u00e2u t\u00edch ph\u00e2n, h\u1ecdc sinh ch\u1ec9 c\u1ea7n nh\u1eadp v\u00e0o m\u00e1y t\u00ednh l\u00e0 s\u1ebd ra k\u1ebft qu\u1ea3 (c\u00e2u 25, c\u00e2u 26). Ph\u1ea7n h\u00ecnh h\u1ecdc c\u00f3 15 c\u00e2u, chi\u1ebfm kho\u1ea3ng 3 \u0111i\u1ec3m gi\u1ed1ng nh\u01b0 trong \u0111\u1ec1 thi t\u1ef1 lu\u1eadn. Ph\u1ea7n h\u00ecnh h\u1ecdc kh\u00f4ng gian, v\u1eabn c\u00f3 c\u00e1c ch\u1ee7 \u0111\u1ec1 quen thu\u1ed9c nh\u01b0 t\u00ednh th\u1ec3 t\u00edch kh\u1ed1i ch\u00f3p, kho\u1ea3ng c\u00e1ch trong kh\u00f4ng gian, b\u00e1n k\u00ednh m\u1eb7t c\u1ea7u ngo\u1ea1i ti\u1ebfp. Ngo\u00e0i ra, m\u1ed9t s\u1ed1 ph\u1ea7n m\u1edbi xu\u1ea5t hi\u1ec7n nh\u01b0: h\u00ecnh n\u00f3n (c\u00e2u 39), h\u00ecnh tr\u1ee5 (c\u00e2u 40, c\u00e2u 41).<\/p>\n

C\u00e1c c\u00e2u h\u1ecfi t\u00ednh to\u00e1n trong \u0111\u1ec1 thi, \u0111a ph\u1ea7n \u1edf m\u1ee9c \u0111\u1ed9 c\u01a1 b\u1ea3n. C\u00e1c b\u01b0\u1edbc t\u00ednh to\u00e1n l\u00e0 t\u01b0\u1eddng minh, h\u1ecdc sinh ch\u1ec9 c\u1ea7n v\u1eadn d\u1ee5ng l\u00fd thuy\u1ebft, thu\u1ed9c c\u00f4ng th\u1ee9c l\u00e0 l\u00e0m \u0111\u01b0\u1ee3c. \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u00e1nh cho c\u00e1c em ph\u1ea3i luy\u1ec7n c\u00e1c b\u00e0i to\u00e1n ph\u1ee9c t\u1ea1p, m\u1eb9o m\u1ef1c.<\/p>\n

\u0110\u1ec1 minh h\u1ecda ra gi\u00e0n tr\u1ea3i kh\u1eafp c\u1ea3 ch\u01b0\u01a1ng tr\u00ecnh 12, ra c\u1ea3 v\u00e0o c\u00e1c ph\u1ea7n m\u00e0 tr\u01b0\u1edbc \u0111\u00e2y c\u00e1c gi\u00e1o vi\u00ean d\u1ea1y qua loa, th\u1eadm ch\u00ed l\u1edd \u0111i kh\u00f4ng d\u1ea1y: \u1ee9ng d\u1ee5ng c\u1ee7a \u0111\u1ea1o h\u00e0m, c\u00e1c kh\u1ed1i tr\u00f2n xoay. \u0110i\u1ec1u n\u00e0y l\u00e0m cho c\u00e1c gi\u00e1o vi\u00ean ph\u1ea3i \u0111i\u1ec1u ch\u1ec9nh n\u1ed9i dung gi\u1ea3ng d\u1ea1y c\u1ee7a m\u00ecnh trong th\u1eddi gian s\u1eafp t\u1edbi, kh\u00f4ng c\u00f2n d\u1ea1y xo\u00e1y v\u00e0o m\u1ed9t s\u1ed1 n\u1ed9i dung tr\u1ecdng t\u00e2m nh\u01b0 tr\u01b0\u1edbc n\u1eefa.<\/p>\n

V\u1edbi \u0111i\u1ec1u ki\u1ec7n th\u1eddi gian trong 90 ph\u00fat c\u00f9ng \u00e1p l\u1ef1c c\u1ee7a ph\u00f2ng thi, h\u1ecdc sinh trung b\u00ecnh c\u00f3 th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c t\u1eeb 20 \u2013 25 c\u00e2u. H\u1ecdc sinh kh\u00e1 \u2013 gi\u1ecfi l\u00e0m \u0111\u01b0\u1ee3c t\u1eeb 40 \u2013 45 c\u00e2u. M\u1eb7c d\u00f9 kh\u00f4ng c\u00f3 c\u00e1c c\u00e2u ph\u00e2n lo\u1ea1i qu\u00e1 kh\u00f3 nh\u01b0 trong \u0111\u1ec1 t\u1ef1 lu\u1eadn, ch\u1ec9 c\u00f3 c\u00e1c h\u1ecdc sinh xu\u1ea5t s\u1eafc m\u1edbi c\u00f3 th\u1ec3 l\u00e0m tr\u1ecdn v\u1eb9n b\u00e0i thi n\u00e0y.<\/p>\n

Theo D\u00e2n tr\u00ed<\/strong><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Nh\u1eadn \u0111\u1ecbnh v\u1ec1 \u0111\u1ec1 thi minh h\u1ecda To\u00e1n THPT qu\u1ed1c gia, Ti\u1ebfn s\u0129 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y to\u00e1n L\u00ea Th\u1ed1ng Nh\u1ea5t cho bi\u1ebft, t\u1ef7 l\u1ec7 c\u00e1c c\u00e2u ki\u1ec3m tra ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u1edf m\u1ee9c \u0111\u1ed9 cho m\u1ee5c ti\u00eau t\u1ed1t nghi\u1ec7p THPT nhi\u1ec1u h\u01a1n nh\u1eefng c\u00e2u \u0111\u00f2i h\u1ecfi v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c nh\u1eb1m t\u1edbi vi\u1ec7c […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[157,19],"tags":[],"yoast_head":"\n7 b\u00ed quy\u1ebft d\u1ea1y, \u00f4n t\u1eadp t\u1ed1t \u0111\u1ec1 thi tr\u1eafc nghi\u1ec7m m\u00f4n To\u00e1n THPT qu\u1ed1c gia<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/7-bi-quyet-day-tap-tot-de-thi-trac-nghiem-mon-toan-thpt-quoc-gia\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"7 b\u00ed quy\u1ebft d\u1ea1y, \u00f4n t\u1eadp t\u1ed1t \u0111\u1ec1 thi tr\u1eafc nghi\u1ec7m m\u00f4n To\u00e1n THPT qu\u1ed1c gia\" \/>\n<meta property=\"og:description\" content=\"Nh\u1eadn \u0111\u1ecbnh v\u1ec1 \u0111\u1ec1 thi minh h\u1ecda To\u00e1n THPT qu\u1ed1c gia, Ti\u1ebfn s\u0129 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y to\u00e1n L\u00ea Th\u1ed1ng Nh\u1ea5t cho bi\u1ebft, t\u1ef7 l\u1ec7 c\u00e1c c\u00e2u ki\u1ec3m tra ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n \u1edf m\u1ee9c \u0111\u1ed9 cho m\u1ee5c ti\u00eau t\u1ed1t nghi\u1ec7p THPT nhi\u1ec1u h\u01a1n nh\u1eefng c\u00e2u \u0111\u00f2i h\u1ecfi v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c nh\u1eb1m t\u1edbi vi\u1ec7c […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/7-bi-quyet-day-tap-tot-de-thi-trac-nghiem-mon-toan-thpt-quoc-gia\/\" \/>\n<meta property=\"og:site_name\" content=\"Lop12.edu.vn - 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