

MCQOPTIONS
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1. |
If \(\vec a = \hat i + \hat j + \hat k,\;\vec b= 2\hat i - 4\hat k,\;\vec c=\hat i + λ \hat j + 3\hat k\) are coplanar, then the value of λ is: |
A. | 5/2 |
B. | 3/5 |
C. | 7/3 |
D. | 5/3 |
Answer» E. | |