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If bara=2hati+5hatjand barb=2hati-hatj,t...

If `bara=2hati+5hatj`and `barb=2hati-hatj`,then the unit vector along `bara+barb`will be

A

a)`(hati-hatj)/sqrt2`

B

b)`hati+hatj`

C

c)`sqrt2(hati+hatj)`

D

d)`(hati+hatj)/sqrt2`

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