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The solution set of the inequality |9^x...

The solution set of the inequality `|9^x-3^(x+1) + 15| < 2.9^x - 3^x` is

A

`(-oo,1)`

B

`(1,oo)`

C

`(-oo,1]`

D

`(-1,oo)`

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The correct Answer is:
(b)
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