If \(\vec a = \left( \hat i + \hat j + \hat k \right),\; \vec a \cdot – McqOptions

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1.	If \(\vec a = \left( \hat i + \hat j + \hat k \right),\; \vec a \cdot \vec b = 1\) and \(\vec a \times \vec b = \hat j - \hat k\) then \(\vec b\) is:
A.	î + ĵ + k̂
B.	2ĵ - k̂
C.	î
D.	2î
Answer» D. 2î

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