Giáo án Hình học 11 chương 3 bài 1: Vectơ trong không gian

Bài giảng Hình học 11 chương 3 bài 1 Vectơ trong không gian

Bài giảng Hình học 11 chương 3 bài 1 Vectơ trong không gian
... 1. Vectơ không gian ĐỊNH NGHĨA VECTƠ V E C T Ơ VECTƠ CÙNG PHƯƠNG VECTƠ BẰNG NHAU VEC TƠ-KHÔNG PHÉP CỘNG CÁC VEC TƠ CÁC PHÉP TOÁN VECTƠ PHÉP TRỪ HAI VECTƠ PHÉP NHÂN VÉC TƠ ... O,A,B,C nằm mặt phẳng Ví d 1 Cho hình lập phương ABCD.A’B’C’D’ Hãy xác định rõ ba véc tơ sau đồng phẳng không đồng phẳng 1) 2) 3) 4) u u u uru ur ur u u u u DA, DC , DD ' (Không đồng phẳng) u u u ... OX = OX ' + X ' X ( 1) uuu u ur r X ' X = mc ( ) Vì A  a       a, b, OX ' đồng phẳng, a, bkhông phương      ⇒ OX ' = k a + lb ( 3)        Từ (1) ,(2), (3) ta có: x = OX =...
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