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

Câu 5 Cho a r

= (1; –3; 2), b r

= (m + 1, m – 2, 1 – m), c r

= (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