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If log(2) (9^(x - 1) + 7) - log(2) (3^(x...

If `log_(2) (9^(x - 1) + 7) - log_(2) (3^(x-1) + 1) = 2` , then values of x are

A

1 , 2

B

0 , 2

C

0 , 1

D

1, 4

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