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If vec(a)=2hat(i)+lambda hat(j)+hat(k) a...

If `vec(a)=2hat(i)+lambda hat(j)+hat(k)` and `vec(b)=-hat(i)+2hat(j)-3hat(k)` are orthogonal, then value of `lambda` is

A

0

B

1

C

`(3)/(2)`

D

`(5)/(2)`

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The correct Answer is:
D
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