CHO BỐN VECTOR − → A = (2; −3; 1), − →B = (−1; 2; 5), − → C =...

Câu 34. Cho bốn vector − → a = (2; −3; 1), − →

b = (−1; 2; 5), − → c = (2; −2; 6) ,

−

→ d = (3; 1; 2) , phân tích vector − →

d theo ba vector − → a , − →

b , − → c ta được

b + 10 − → c

d = −13 − → a − 9 − →

b − 9 − → c B. − →

d = 12 − → a − 8 − →

A. − →

d = 13 − → a − 12 − →

b − 9 − → c D. − →

d = −14 − → a − 10 − →

b + 13 − → c

C. − →

b = (1; −3; 2), − → c = (−3; 2; −2) ,