K\u00ec thi THPT qu\u1ed1c gia 2016 \u0111ang \u0111\u1ebfn g\u1ea7n, \u0111\u1ec3 l\u00e0m b\u00e0i thi m\u00f4n To\u00e1n \u0111\u1ea1t \u0111i\u1ec3m cao, th\u00ed sinh c\u1ea7n ph\u1ea3i c\u00f3 nh\u1eefng \u201cchi\u1ebfn thu\u1eadt\u201d \u00f4n thi m\u1edbi hi\u1ec7u qu\u1ea3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 4 c\u00e1ch gi\u00fap th\u00ed sinh gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c n\u1ed7i lo l\u1eafng c\u1ee7a m\u00ecnh tr\u01b0\u1edbc k\u1ef3 thi.<\/strong><\/p>\n

Th\u1ee9 nh\u1ea5t:\u00a0C\u00e1c em kh\u00f4ng n\u00ean quan t\u00e2m \u0111\u1ebfn vi\u1ec7c \u0111\u1ec1 d\u1ec5 hay kh\u00f3, v\u00ec d\u1ec5 th\u00ec c\u0169ng d\u1ec5 chung c\u1ea3 n\u01b0\u1edbc, m\u00e0 kh\u00f3 th\u00ec c\u0169ng kh\u00f3 chung<\/strong>. D\u1ec5 th\u00ec \u0111i\u1ec3m chu\u1ea9n s\u1ebd cao, kh\u00f3 th\u00ec \u0111i\u1ec3m chu\u1ea9n th\u1ea5p. Quan tr\u1ecdng l\u00e0 ph\u1ea3i t\u1eadp trung v\u00e0o \u00f4n thi sao cho c\u00f3 \u0111i\u1ec3m r\u01a1i phong \u0111\u1ed9 cao nh\u1ea5t so v\u1edbi kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed7i th\u00ed sinh.<\/p>\n

S\u1ee9c ti\u1ebfp thu c\u1ee7a tr\u00ed n\u00e3o l\u00e0 c\u00f3 h\u1ea1n n\u00ean c\u00e1c em ph\u1ea3i bi\u1ebft d\u1ed3n s\u1ee9c cho vi\u1ec7c \u00f4n thi tr\u00e1nh b\u1ecb ph\u00e2n t\u00e2m b\u1edfi vi\u1ec7c d\u00f9ng \u0111i\u1ec7n tho\u1ea1i, m\u1ea1ng x\u00e3 h\u1ed9i, sinh nh\u1eadt b\u1ea1n b\u00e8\u2026, Th\u1eddi gian gi\u1ea3i tr\u00ed ph\u1ea3i c\u00f3 k\u1ec9 lu\u1eadt, ch\u1ebf \u0111\u1ed9 \u0103n u\u1ed1ng v\u00e0 ngh\u1ec9 ng\u01a1i ph\u1ea3i c\u00f3 s\u1ef1 t\u01b0 v\u1ea5n c\u1ee7a b\u00e1c s\u0129 khi c\u1ea7n.
\n<\/p>\n

Th\u1ee9 hai:<\/strong>\u00a0\u0110i s\u00e2u v\u00e0o v\u1ea5n \u0111\u1ec1 chuy\u00ean m\u00f4n c\u00e1c em ph\u1ea3i bi\u1ebft c\u00e1ch h\u1ecdc m\u1eb9o \u0111\u1ec3 r\u00fat ng\u1eafn th\u1eddi gian \u00f4n thi. V\u00ed d\u1ee5 ph\u1ea7n kh\u1ea3o s\u00e1t h\u00e0m s\u1ed1 v\u00e0 v\u1ebd \u0111\u1ed3 th\u1ecb,<\/strong> c\u00e1c em h\u1ebft s\u1ee9c l\u01b0u \u00fd vi\u1ec7c t\u00ednh \u0111\u00fang \u0111\u1ea1o h\u00e0m b\u1eadc nh\u1ea5t tr\u00ean b\u1eadc nh\u1ea5t b\u1eb1ng \u0111\u1ecbnh th\u1ee9c \u0111\u1ec3 v\u1eeba nhanh v\u1eeba ch\u00ednh x\u00e1c.<\/p>\n

\n
• Ti\u1ebfp theo l\u1eadp b\u1ea3ng bi\u1ebfn thi\u00ean, n\u1ebfu c\u00e1c em ch\u00f3t qu\u00ean c\u00e1ch t\u00ednh gi\u1edbi h\u1ea1n th\u00ec c\u00f3 th\u1ec3 l\u00e0m theo qui tr\u00ecnh ng\u01b0\u1ee3c, \u0111\u00f3 l\u00e0 v\u1ebd ph\u00e1c th\u1ea3o \u0111\u1ed7 th\u00ec ra gi\u1ea5y nh\u00e1p tr\u00ean c\u01a1 s\u1edf x\u00e9t d\u1ea5u c\u1ee7a \u0111\u1ea1o h\u00e0m, t\u1eeb \u0111\u1ed3 th\u00ec s\u1ebd ho\u00e0n ch\u1ec9nh \u0111\u01b0\u1ee3c b\u1ea3ng bi\u1ebfn thi\u00ean.<\/li>\n
• Kh\u00f4ng \u0111\u01b0\u1ee3c v\u1ebd \u0111\u1ed3 th\u1ecb b\u1eb1ng vi\u1ebft ch\u00ec, n\u1ebfu kh\u00f4ng b\u00e0i thi s\u1ebd b\u1ecb ch\u1ea5m t\u1eadp th\u1ec3 trong h\u1ed9i \u0111\u1ed3ng ch\u1ea5m thi. \u0110\u00e2y c\u0169ng l\u00e0 quy \u0111\u1ecbnh chung v\u1edbi c\u00e1c c\u00e2u c\u00f3 h\u00ecnh v\u1ebd, tr\u1eeb khi v\u1ebd h\u00ecnh b\u1eb1ng compa. \u0110\u1ed3 th\u00ec ph\u1ea3i n\u1eb1m trong tr\u1ee5c t\u1ecda \u0111\u1ed9, l\u00e0 1 n\u00e9t thanh, m\u1ea3nh, li\u1ec1n \u0111\u1ec1u\u2026.<\/li>\n<\/ul>\n

  Th\u1ee9 ba:\u00a0V\u1edbi b\u00e0i to\u00e1n t\u00edch ph\u00e2n <\/strong>nay \u0111\u00e3 thu\u1ed9c v\u00e0o 60% ph\u1ea7n \u0111\u1ec1 d\u1ec5 n\u00ean c\u00e1c em ch\u1ec9 c\u1ea7n x\u00e2y d\u1ef1ng c\u00e1c d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft c\u1ee5 th\u1ec3 l\u00e0 ch\u1eafc ch\u1eafn l\u1ea5y \u0111\u01b0\u1ee3c \u0111i\u1ec3m. V\u00ed d\u1ee5 khi th\u1ea5y t\u00edch ph\u00e2n l\u00e0 t\u00edch c\u1ee7a 2 h\u00e0m tr\u00e1i nhau v\u1ec1 b\u1ea3n ch\u1ea5t th\u00ec d\u00f9ng t\u00edch ph\u00e2n t\u1eebng ph\u1ea7n, khi th\u1ea5y c\u0103n th\u00ec \u0111\u1eb7t c\u0103n b\u1eb1ng \u201cbi\u1ebfn t\u201d \u2026<\/p>\n

  Th\u1ee9 t\u01b0:\u00a0V\u1edbi b\u00e0i to\u00e1n H\u00ecnh h\u1ecdc kh\u00f4ng gian<\/strong> trong \u0111\u1ec1 th\u01b0\u1eddng c\u00f3 2 \u00fd, l\u00e0 t\u00ednh th\u1ec3 t\u00edch v\u00e0 t\u00edch kho\u1ea3ng c\u00e1ch gi\u1eefa 2 \u0111\u01b0\u1eddng ch\u00e9o nhau.<\/p>\n

  \n
  • Ph\u1ea7n t\u00ednh th\u1ec3 t\u00edch c\u00e1c em ch\u1ec9 c\u1ea7n nh\u1edb c\u00f4ng th\u1ee9c V=1\/3 Bh trong \u0111\u00f3 B l\u00e0 di\u1ec7n t\u00edch \u0111\u00e1y, h l\u00e0 chi\u1ec1u cao.<\/li>\n
  • Di\u1ec7n t\u00edch \u0111\u00e1y th\u00ec th\u01b0\u1eddng l\u00e0 tam gi\u00e1c \u0111\u1eb7c bi\u1ec7t ho\u1eb7c t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t n\u00ean c\u00e1c em kh\u00f4ng \u0111\u00e1ng ng\u1ea1i. C\u00f2n chi\u1ec1u cao th\u00ec trong \u0111\u1ec1 th\u01b0\u1eddng ch\u1ec9 c\u00f3 3,4 lo\u1ea1i nh\u01b0 chop \u0111\u1ec1u th\u00ec chi\u1ec1u cao l\u00e0 \u0111\u01b0\u1eddng n\u1ed1i \u0111\u1ec9nh \u0111\u1ebfn t\u00e2m c\u1ee7a \u0111\u00e1y, chop c\u00f3 1 m\u1eb7t b\u00ean vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y th\u00ec chi\u1ec1u cao l\u00e0 \u0111\u01b0\u1eddng k\u1ebb vu\u00f4ng g\u00f3c t\u1eeb \u0111\u1ec9nh xu\u1ed1ng giao tuy\u1ebfn, chop c\u00f3 2 m\u1eb7t b\u00ean c\u00f9ng vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y th\u00ec \u0111\u01b0\u1eddng cao l\u00e0 giao tuy\u1ebfn c\u1ee7a 2 m\u1eb7t b\u00ean,\u2026.<\/li>\n
  • K\u1ebft h\u1ee3p v\u1edbi ch\u00fat ki\u1ebfn th\u1ee9c c\u1ee7a h\u00ecnh h\u1ecdc l\u1edbp 9 l\u00e0 c\u00e1c em s\u1ebd t\u00ednh \u0111\u01b0\u1ee3c ch\u00ednh x\u00e1c chi\u1ec1u cao. Ph\u1ea7n th\u1ee9 2 l\u00e0 t\u00ednh kho\u1ea3ng c\u00e1ch c\u00e1c em n\u00ean qui v\u1ec1 b\u00e0i to\u00e1n c\u01a1 b\u1ea3n, t\u1ee9c l\u00e0 t\u00ednh kho\u1ea3ng c\u00e1ch t\u1eeb ch\u00e2n \u0111\u01b0\u1eddng cao c\u1ee7a h\u00ecnh chop.<\/li>\n
  • N\u1ebfu th\u1ea5y kh\u00f3 hi\u1ec3u qu\u00e1 th\u00ec gi\u1ea3i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00ecnh h\u1ecdc thu\u1ea7n t\u00fay \u0111\u01b0a h\u1ec7 tr\u1ee5c t\u1ecda \u0111\u1ed9 v\u00e0o \u0111\u1ec3 chuy\u1ec3n th\u00e0nh b\u00e0i to\u00e1n h\u00ecnh gi\u1ea3i t\u00edch trong kh\u00f4ng gian th\u00ec ki\u1ec3u g\u00ec c\u0169ng gi\u1ea3i \u0111\u01b0\u1ee3c.<\/li>\n<\/ul>\n

    C\u00e1c ph\u1ea7n c\u00f2n l\u1ea1i c\u00e1c em h\u1ecdc t\u01b0\u01a1ng t\u1ef1, sau khi ch\u1eafc \u0103n \u0111\u01b0\u1ee3c ph\u1ea7n 60% \u0111\u1ec1 c\u01a1 b\u1ea3n c\u00e1c em m\u1edbi b\u01b0\u1edbc sang \u00f4n 40% ph\u1ea7n n\u00e2ng cao c\u00f2n l\u1ea1i.<\/em><\/strong><\/p>\n

    \u0110\u01a1n c\u1eed nh\u01b0 c\u00e2u v\u1ec1 gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh, h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh ho\u1eb7c b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 ch\u1ee9a c\u0103n th\u1ee9c<\/strong><\/em>. Th\u01b0\u1eddng \u0111\u00e2y l\u00e0 m\u1ed9t c\u00e2u kh\u00f3 th\u1ee9 nh\u00ec. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i quan tr\u1ecdng nh\u01b0 \u0111\u1eb7t \u1ea9n ph\u1ee5, li\u00ean h\u1ee3p, d\u00f9ng b\u1ea5t \u0111\u1eb3ng th\u1ee9c \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u1ea7n \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p nhu\u1ea7n nhuy\u1ec5n v\u1edbi nhau khi gi\u1ea3i.<\/p>\n

    \n
    • C\u00e1c em ph\u1ea3i bi\u1ebft c\u00e1ch s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 m\u00e1y t\u00ednh c\u1ea7m tay \u0111\u1ec3 gi\u1ea3m nh\u1eb9 kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh to\u00e1n, \u0111\u1ed3ng th\u1eddi h\u1ed7 tr\u1ee3 cho m\u00ecnh trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch nh\u00e2n t\u1eed, c\u0169ng nh\u01b0 d\u1ef1 \u0111o\u00e1n nghi\u1ec7m.<\/li>\n<\/ul>\n

      C\u00e2u kh\u00f3 nh\u1ea5t d\u00f9ng \u0111\u1ec3 ph\u00e2n lo\u1ea1i th\u00ed sinh l\u00e0 c\u00e2u<\/strong><\/em>b\u1ea5t \u0111\u1eb3ng th\u1ee9c<\/strong><\/em>. \u0110\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c c\u00e2u n\u00e0y \u0111\u00f2i h\u1ecfi th\u00ed sinh ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng t\u01b0 duy \u0111\u1ed9c l\u1eadp, c\u1ea7n ch\u1ee7 \u0111\u1ed9ng s\u00e1ng t\u1ea1o, c\u00f3 kh\u1ea3 n\u0103ng v\u1eadn d\u1ee5ng ki\u1ebfn th\u1ee9c t\u1ed5ng h\u1ee3p v\u00e0o gi\u1ea3i quy\u1ebft m\u1ed9t v\u1ea5n \u0111\u1ec1, kh\u00f4ng l\u00e0m theo khu\u00f4n m\u1eabu.<\/p>\n

      \n
      • Ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn l\u00e0 ch\u1ecdn \u0111i\u1ec3m r\u01a1i trong b\u1ea5t \u0111\u1eb3ng th\u1ee9c C\u00f4 si ho\u1eb7c Bunhiacopxki, tuy nhi\u00ean xu h\u01b0\u1edbng trong c\u00e1c \u0111\u1ec1 thi c\u1ee7a B\u1ed9 gi\u00e1o d\u1ee5c trong su\u1ed1t nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y l\u00e0 \u0111\u01b0a b\u00e0i to\u00e1n 3 bi\u1ebfn x, y, z v\u1ec1 b\u00e0i to\u00e1n 1 bi\u1ebfn n\u00e0o \u0111\u00f3 r\u1ed3i kh\u1ea3o s\u00e1t h\u00e0m m\u1ed9t bi\u1ebfn \u0111\u00f3 \u0111\u1ec3 \u0111i \u0111\u1ebfn k\u1ebft lu\u1eadn.\u00a0Th\u01b0\u1eddng th\u00ec ta s\u1ebd d\u1ed3n v\u1ec1 bi\u1ebfn c\u00f3 vai tr\u00f2 kh\u00f4ng \u0111\u1ed1i x\u1ee9ng. Su\u1ed1t qu\u00e1 tr\u00ecnh \u0111\u00e1nh gi\u00e1 b\u00e0i to\u00e1n, ta ph\u1ea3i \u0111\u1ea3m b\u1ea3o \u0111\u01b0\u1ee3c d\u1ea5u \u201c=\u201d x\u1ea3y ra.<\/li>\n<\/ul>\n

        C\u00e1c em l\u1ea5y \u0111\u01b0\u1ee3c \u0111i\u1ec3m ph\u1ea7n n\u00e0y th\u01b0\u1eddng l\u00e0 h\u1ecdc sinh chuy\u00ean, h\u1ecdc sinh gi\u1ecfi c\u00e1c c\u1ea5p, c\u00e1c em n\u00e0y ph\u1ea3i c\u00f3 th\u1eddi gian \u00f4n thi l\u00e2u d\u00e0i m\u1edbi l\u00e0m \u0111\u01b0\u1ee3c, n\u1ebfu kh\u00f4ng th\u1eadt s\u1ef1 t\u1ef1 tin th\u00ec c\u00e1c em n\u00ean b\u1ecf qua, s\u1ebd quay l\u1ea1i b\u00e0i n\u00e0y sau khi \u0111\u00e3 gi\u1ea3i quy\u1ebft nh\u1eefng b\u00e0i to\u00e1n kh\u00e1c v\u00e0 c\u00f2n th\u1eddi gian. \u0110\u1ed7 \u0111\u1ea1i h\u1ecdc l\u00e0 \u0111i\u1ec3m c\u1ee7a 3 m\u00f4n n\u00ean m\u00f4n to\u00e1n ch\u1ec9 \u0111\u01b0\u1ee3c 9 \u0111i\u1ec3m c\u0169ng \u0111\u00e3 l\u00e0 qu\u00e1 t\u1ed1t r\u1ed3i.<\/p>\n

        Cu\u1ed1i c\u00f9ng<\/em>, <\/strong>sau khi \u0111\u00e3 \u00f4n thi xong h\u1ebft c\u00e1c chuy\u00ean \u0111\u1ec1, c\u00e1c em ph\u1ea3i c\u00f3 th\u1eddi gian thi th\u1eed nhi\u1ec1u l\u1ea7n \u0111\u1ec3 r\u00e8n t\u00e2m l\u00ed ph\u00f2ng th\u00ec v\u00e0 r\u00e8n c\u00e1ch tr\u00ecnh b\u00e0y sao cho \u0111\u1ee1 m\u1ea5t \u0111i\u1ec3m. C\u00e1c b\u00e0i kh\u00f3 qu\u00e1 ch\u1ec9 l\u00e0m \u0111\u01b0\u1ee3c m\u1ed9t v\u00e0i b\u01b0\u1edbc c\u0169ng ghi v\u00e0o b\u00e0i thi \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a \u0111i\u1ec3m s\u1ed1.<\/p>\n

        M\u1ed7i em chu\u1ea9n b\u1ecb 1 cu\u1ed1n s\u1ed5 tay, sau m\u1ed7i l\u1ea7n thi th\u1eed ghi l\u1ea1i nh\u1eefng ph\u1ea7n c\u00f2n b\u1ecb m\u1ea5t \u0111i\u1ec3m \u0111\u1ec3 c\u00f3 k\u1ebf ho\u1ea1ch \u00f4n thi, h\u1ecfi th\u00e0y c\u00f4, b\u1ea1n b\u00e8 tr\u00ean tr\u01b0\u1eddng \u0111\u1ec3 ho\u00e0n thi\u1ec7n trong nh\u1eefng l\u1ea7n thi th\u1eed ti\u1ebfp theo. C\u1ee9 nh\u01b0 th\u1ebf th\u00ec c\u00e1c em s\u1ebd c\u00f3 3 th\u00e1ng \u00f4n thi \u0111\u1ea1t phong \u0111\u1ed9 cao nh\u1ea5t trong m\u00f4n To\u00e1n.<\/p>\n\n\n\n

        \u201cChi\u1ebfn thu\u1eadt\u201d \u00f4n thi m\u00f4n To\u00e1n tr\u00ean l\u00e0 c\u1ee7a t\u1eadp th\u1ec3 c\u00e1c gi\u00e1o vi\u00ean v\u00e0 th\u1ee7 khoa trong Trung t\u00e2m Th\u1ee7 Khoa Vi\u1ec7t Nam (ti\u1ec1n th\u00e2n l\u00e0 CLB Gia s\u01b0 Th\u1ee7 khoa) \u0111\u01b0a ra trong 3 th\u00e1ng gi\u00fap c\u00e1c em c\u00f3 th\u1ec3 t\u1ef1 \u00f4n.<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u00a0(Theo H\u1ed3ng H\u1ea1nh\u00a0\/ D\u00e2n tr\u00ed)<\/em><\/p>\n  <\/p>\n","protected":false},"excerpt":{"rendered":" K\u00ec thi THPT qu\u1ed1c gia 2016 \u0111ang \u0111\u1ebfn g\u1ea7n, \u0111\u1ec3 l\u00e0m b\u00e0i thi m\u00f4n To\u00e1n \u0111\u1ea1t \u0111i\u1ec3m cao, th\u00ed sinh c\u1ea7n ph\u1ea3i c\u00f3 nh\u1eefng \u201cchi\u1ebfn thu\u1eadt\u201d \u00f4n thi m\u1edbi hi\u1ec7u qu\u1ea3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 4 c\u00e1ch gi\u00fap th\u00ed sinh gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c n\u1ed7i lo l\u1eafng c\u1ee7a m\u00ecnh tr\u01b0\u1edbc k\u1ef3 thi. Th\u1ee9 nh\u1ea5t:\u00a0C\u00e1c em kh\u00f4ng n\u00ean […]<\/p>\n","protected":false},"author":2,"featured_media":843,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[157],"tags":[],"yoast_head":"\n