CHO A = (1; –3; 2), B = (M + 1, M – 2, 1 – M), C = (0; M – 2; 2)....

Câu 5: Cho a 

= (1; –3; 2), b 

= (m + 1, m – 2, 1 – m), c 

= (0; m – 2; 2). Tìm m để ba vector

đó đồng phẳng.

A. m = 0 V m = –2 B. m = –1 V m = 2 C. m = 0 V m = –1 D. m = 2 V m = 0