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If bara=overset(^)i+overset(^)j+overset(...

If `bara=overset(^)i+overset(^)j+overset(^)k,barb=2overset(^)i+lambdaoverset(^)j+overset(^)k,barc=overset(^)i-overset(^)j+4overset(^)k`
and `bara.(barbxxbarc)=10`, then `lambda` is equal to

A

(a) `6`

B

(b) `7`

C

(c) `9`

D

(d) `10`

Text Solution

Verified by Experts

The correct Answer is:
A
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