Question

The vectors $3\hat{i}-\hat{j}+2\hat{k},2\hat{i}+\hat{j}+3\hat{k}$ and $\hat{i}+λ\hat{j}-\hat{k}$ are coplanar if λ is :

• A. -2
• B. 0
• C. 2
• D. any real number

Answer 1

Answer: (A)

-2

Answer 2

The correct option is (A) :-2.