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If vec alpha = 2 hati + 3 hatj - hatk, v...

If `vec alpha = 2 hati + 3 hatj - hatk, vec beta =- hati + 2 hatj - 4 hatk, vec lamda = hati + hatj + hatk,` then `(vec alpha xx vecbeta). (vec alpha xx vec gamma)` is :

A

minus 74

B

74

C

64

D

60

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The correct Answer is:
A
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