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यदि veca =hati +hatj +hatk, veca *vecb =...

यदि `veca =hati +hatj +hatk, veca *vecb =2` और `veca xx vecb = 2hati+hatj-3hatk` है, तो `vecb` है:

A

A.`(2hati -hatj +hatk)`

B

B.`(4hati-4hatj+2hatk)`

C

C.`(1)/(2)(3hati+7hatj+9hatk)`

D

D.`(1)/(29) (7hati-4hatj +14hatk)`

लिखित उत्तर

Verified by Experts

The correct Answer is:
D
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