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Let `A = (alpha , 1 ,2 alpha ) , B= (3, 1,2) and C = 4 hati - hatj + 3 hatk .` If `AB xx C = 6 hati + 9 hatj - 5hatk,` then `alpha^(2) + alpha + 5=`

A

11

B

7

C

9

D

5

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B
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