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If veca and vecb are vectors such that |...

If `veca and vecb` are vectors such that `|veca+ecb|=sqrt(29) and veca xx (2hati+3hatj+4hatk)=(2hati+3hatj+4hatk) xxvecb,` then possible value of `(veca+vecb).(-7hati+2hatj+3hatk)` is (A) 0 (B) 3 (C) 4 (D) 8

A

0

B

3

C

4

D

8

Text Solution

Verified by Experts

The correct Answer is:
C
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