{"id":44439,"date":"2019-10-21T17:27:26","date_gmt":"2019-10-21T10:27:26","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=44439"},"modified":"2021-03-21T23:30:41","modified_gmt":"2021-03-21T16:30:41","slug":"giai-toan-10-chuong-3-phuong-phap-toa-do-trong-mat-phang-bai-1-phuong-trinh-duong-thang","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-3-phuong-phap-toa-do-trong-mat-phang-bai-1-phuong-trinh-duong-thang\/","title":{"rendered":"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 3: Ph\u01b0\u01a1ng ph\u00e1p t\u1ecda \u0111\u1ed9 trong m\u1eb7t ph\u1eb3ng\/ B\u00e0i 1: Ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng th\u1eb3ng"},"content":{"rendered":"\n

B\u00e0i 1: Ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng th\u1eb3ng<\/h2>\n\n\n\n
Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 H\u00ecnh h\u1ecdc B\u00e0i 1 trang 70<\/strong>: Trong m\u1eb7t ph\u1eb3ng Oxy cho \u0111\u01b0\u1eddng th\u1eb3ng \uf044 l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a h\u00e0m s\u1ed1: y = 1\/2x.<\/ins><\/p>\n\n\n\n
a) T\u00ecm tung \u0111\u1ed9 c\u1ee7a hai \u0111i\u1ec3m M_{o<\/sub> v\u00e0 M n\u1eb1m tr\u00ean \u0394, c\u00f3 ho\u00e0nh \u0111\u1ed9 l\u1ea7n l\u01b0\u1ee3t l\u00e0 2 v\u00e0 6.<\/p>\n\n\n\n}
b) Cho vect\u01a1 u\u2192<\/em> = (2; 1). H\u00e3y ch\u1ee9ng t\u1ecf M_{o<\/sub>M\u2192<\/em> c\u00f9ng ph\u01b0\u01a1ng v\u1edbi u \u20d7.<\/p>\n\n\n\n}
L\u1eddi gi\u1ea3i<\/strong><\/p>\n\n\n\n
a) V\u1edbi x = 2 \u21d2 y = 1\/2 x = 1 \u21d2 M_{o<\/sub> (2;1)<\/p>\n\n\n\n}
x = 6 \u21d2 y = 1\/2 x = 3 \u21d2 M_{o<\/sub> (6;3)<\/p>\n\n\n\n}
b) M_{o<\/sub>M\u2192<\/em> = (4;2) = 2(2;1) = 2u\u2192<\/em><\/p>\n\n\n\n}
V\u1eady M_{o<\/sub>M\u2192<\/em> c\u00f9ng ph\u01b0\u01a1ng v\u1edbi u<\/em><\/p>\n\n\n\n}
Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 H\u00ecnh h\u1ecdc B\u00e0i 1 trang 71<\/strong>: H\u00e3y t\u00ecm m\u1ed9t \u0111i\u1ec3m c\u00f3 t\u1ecda \u0111\u1ed9 x\u00e1c \u0111\u1ecbnh v\u00e0 m\u1ed9t vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh tham s\u1ed1<\/ins><\/p>\n\n\n\n
$\"Gi\u1ea3i$ <\/figure>\n\n\n\n
L\u1eddi gi\u1ea3i<\/strong><\/p>\n\n\n\n
<\/div><\/div>\n\n\n\n
M\u1ed9t \u0111i\u1ec3m thu\u1ed9c \u0111\u01b0\u1eddng th\u1eb3ng l\u00e0 (5; 2)<\/p>\n