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Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y d\u1ef1a tr\u00ean m\u1ed1i quan h\u1ec7 gi\u1eefa chuy\u00ean \u0111\u1ed9ng tr\u00f2n \u0111\u1ec1u v\u00e0 dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n t\u00ecm th\u1eddi gian, x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m, x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng kh\u00e1c trong \u0111\u00f3 c\u00f3 gi\u1ea3 thi\u1ebft li\u00ean quan \u0111\u1ebfn th\u1eddi gian…<\/p>\n
T\u00e0i li\u1ec7u gi\u1edbi thi\u1ec7u v\u1ec1 ph\u01b0\u01a1ng ph\u00e1p n\u00e0y r\u1ea5t nhi\u1ec1u, c\u00f3 trong c\u00e1c s\u00e1ch tham kh\u1ea3o, c\u00e1c t\u00e0i li\u1ec7u c\u00f3 tr\u00ean m\u1ea1ng. Tuy nhi\u00ean, c\u00e1c t\u00e0i li\u1ec7u n\u00e0y ch\u1ec9 m\u1edbi xem x\u00e9t v\u00e0 gi\u1edbi thi\u1ec7u c\u00e1c b\u00e0i to\u00e1n \u1edf m\u1ee9c \u0111\u1ed9 c\u01a1 b\u1ea3n, s\u1eed d\u1ee5ng m\u1ed9t v\u00f2ng tr\u00f2n \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n, ch\u01b0a c\u00f3 nhi\u1ec1u b\u00e0i kh\u00f3 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u gi\u1ea3i quy\u1ebft b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y.<\/p>\n
Do v\u1eady, \u0111\u1ec3 ho\u00e0n thi\u1ec7n h\u01a1n n\u1eefa v\u00e0 gi\u00fap th\u00ed sinh th\u1ea5y \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, gi\u00e1o vi\u00ean s\u1eed d\u1ee5ng v\u00f2ng tr\u00f2n l\u01b0\u1ee3ng gi\u00e1c trong m\u1ed9t s\u1ed1 b\u00e0i to\u00e1n l\u1ea1 v\u00e0 kh\u00f3. C\u1ee5 th\u1ec3, s\u1eed d\u1ee5ng hai hay nhi\u1ec1u v\u00f2ng tr\u00f2n l\u01b0\u1ee3ng gi\u00e1c l\u1ed3ng nhau (c\u00f9ng t\u00e2m) \u0111\u1ec3 gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a c\u00f3 nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n, ho\u1eb7c c\u00e1c b\u00e0i to\u00e1n hai hay nhi\u1ec1u dao \u0111\u1ed9ng, b\u00e0i to\u00e1n t\u1ed5ng h\u1ee3p dao \u0111\u1ed9ng kh\u00f3,\u2026<\/p>\n
C\u00e1c b\u01b0\u1edbc gi\u1ea3i chung l\u00e0:<\/em><\/p>\n B\u01b0\u1edbc 1: V\u1ebd hai hay nhi\u1ec1u v\u00f2ng tr\u00f2n l\u01b0\u1ee3ng gi\u00e1c c\u00f9ng t\u00e2m, kh\u00e1c b\u00e1n k\u00ednh.<\/p>\n B\u01b0\u1edbc 2: K\u1ebb c\u00e1c tr\u1ee5c g\u1ed1c c\u1ee7a c\u00e1c dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a(c\u0103n c\u1ee9 v\u00e0o \u0111\u1ed9 l\u1ec7ch pha v\u00e0 d\u1ea5u c\u00e1c h\u00e0m \u0111i\u1ec1u h\u00f2a \u0111\u1ec3 v\u1ebd).<\/p>\n B\u01b0\u1edbc 3: D\u1ef1a v\u00e0o gi\u1ea3 thi\u1ebft, th\u1ec3 hi\u1ec7n c\u00e1c th\u00f4ng tin tr\u00ean c\u00e1c v\u00f2ng tr\u00f2n.<\/p>\n B\u01b0\u1edbc 4: S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 to\u00e1n kh\u00e1c h\u1ed7 tr\u1ee3 gi\u1ea3i quy\u1ebft y\u00eau c\u1ea7u \u0111\u1ec1 b\u00e0i.<\/p>\n D\u01b0\u1edbi \u0111\u00e2y l\u00e0 chi ti\u1ebft ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u00f4ng qua vi\u1ec7c gi\u1edbi thi\u1ec7u hai b\u00e0i to\u00e1n : B\u00e0i to\u00e1n th\u1ecfa m\u00e3n nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n v\u00e0 b\u00e0i to\u00e1n x\u00e9t quan h\u1ec7 hai hay nhi\u1ec1u dao \u0111\u1ed9ng.<\/p>\n B\u00e0i to\u00e1n th\u1ecfa m\u00e3n nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n<\/strong><\/p>\n B\u00e0i to\u00e1n n\u00e0y c\u00f3 th\u1ec3 l\u00e0 c\u00e1c b\u00e0i dao \u0111\u1ed9ng c\u01a1, s\u00f3ng c\u01a1, \u0111i\u1ec7n xoay chi\u1ec1u, dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb li\u00ean quan \u0111\u1ebfn c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a, nh\u01b0ng gi\u1eefa c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng c\u00f3 m\u1ed1i quan h\u1ec7 v\u1ec1 pha, quan h\u1ec7 v\u1ec1 bi\u00ean \u0111\u1ed9,\u2026<\/p>\n V\u00ed d\u1ee5: M\u1ed9t con l\u1eafc l\u00f2 xo treo v\u00e0o m\u1ed9t \u0111i\u1ec3m c\u1ed1 \u0111\u1ecbnh, dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a theo ph\u01b0\u01a1ng th\u1eb3ng \u0111\u1ee9ng v\u1edbi chu k\u00ec 1,2 s. Trong m\u1ed9t chu k\u00ec, n\u1ebfu th\u1eddi gian m\u00e0 l\u1ef1c \u0111\u00e0n h\u1ed3i ng\u01b0\u1ee3c chi\u1ec1u l\u1ef1c k\u00e9o v\u1ec1 l\u00e0 0,2 th\u00ec t\u1ec9 s\u1ed1 c\u1ee7a th\u1eddi gian l\u00f2 xo gi\u00e3n v\u1edbi th\u1eddi gian l\u00f2 xo n\u00e9n b\u1eb1ng:<\/p>\n A. 3<\/p>\n B. 4<\/p>\n C. 1<\/p>\n D. 2<\/p>\n H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/em> Tr\u00ean h\u00ecnh v\u1ebd, \u0111\u01b0\u1eddng tr\u00f2n l\u1ef1c k\u00e9o v\u1ec1 c\u00f3 b\u00e1n k\u00ednh l\u00e0 k.A \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng \u0111\u01b0\u1eddng li\u1ec1n, tr\u1ee5c li\u1ec1n. \u0110\u01b0\u1eddng tr\u00f2n l\u1ef1c \u0111\u00e0n h\u1ed3i l\u00e0 \u0111\u01b0\u1eddng \u0111\u1ee9t c\u00f3 b\u00e1n k\u00ednh c\u0169ng l\u00e0 k.A (hai \u0111\u01b0\u1eddng tr\u00f2n tr\u00f9ng nhau nh\u01b0ng g\u1ed1c kh\u00f4ng tr\u00f9ng), tuy nhi\u00ean ta th\u1ec3 hi\u1ec7n hai \u0111\u01b0\u1eddng tr\u00f2n cho d\u1ec5 ph\u00e2n bi\u1ec7t.<\/p>\n