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If the vectors veca=hati-hatj+2hatk, vec...

If the vectors `veca=hati-hatj+2hatk, vecb=2hati+4hatj+hatk` and `vec c=lambdahati+hatj+muhatk` are mutually orthogonal, then `(lambda, mu)`

A

`(-3,2)`

B

`(2,-3)`

C

`(-2,3)`

D

`(3,-2)`

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The correct Answer is:
A
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