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If vec a = i + lambda j + 2k, vec b = mu...

If `vec a = i + lambda j + 2k, vec b = mui + j - k` are orthogonal and` |vec a| = |vec b|` then `(lambda, mu) =`

A

(1/4,7/4)

B

(7/4,1/4)

C

(1/4,9/4)

D

((-1)/4,9/4)

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The correct Answer is:
A
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