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If bara=(1)/(sqrt10)(3overset(^)i+overse...

If `bara=(1)/(sqrt10)(3overset(^)i+overset(^)k),barb=1/7(2overset(^)i+3overset(^)j-6overset(^)k)`,
then the value of `(2bara-barb).{(baraxxbarb)xx(bara+2barb)}` is

A

(a) `-5`

B

(b) `-3`

C

(c) `5`

D

(d) `2`

Text Solution

Verified by Experts

The correct Answer is:
A
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