If the vectors \(2\widehat i + \widehat j + \widehat k\) and \(\widehat i - 4\widehat j + λ \widehat k\) are mutually perpendicular, then the value of λ is:

If the vectors \(2\widehat i + \widehat j + \widehat k\) and \(\wid

1.	If the vectors \(2\widehat i + \widehat j + \widehat k\) and \(\widehat i - 4\widehat j + λ \widehat k\) are mutually perpendicular, then the value of λ is:
A.	1
B.	2
C.	3
D.	4
Answer» C. 3

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If the vectors \(2\widehat i + \widehat j + \widehat k\) and \(\widehat i - 4\widehat j + λ \widehat k\) are mutually perpendicular, then the value of λ is:

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