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Let vecu= hati + hatj , vecv = hati -hat...

Let `vecu= hati + hatj , vecv = hati -hatja and hati -hatj and vecw =hati + 2hatj + 3 hatk` If ` hatn` isa unit vector such that `vecu .hatn=0 and vecn .hatn =0 , " then " |vecw.hatn|` is equal to

A

0

B

1

C

2

D

3

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The correct Answer is:
D
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