int(3^(x)dx)/sqrt(9^(x)-1) is equal to...

`int(3^(x)dx)/sqrt(9^(x)-1)` is equal to

`1/(log 3) log |3^(x) + sqrt(9^(x)-1)|+c`

`1/(log3)log|3^(x) - sqrt(9^(x)-1)|+c`

`1/(log9) log|3^(x)-sqrt(9^(x)-1)|+c`

`1/(log3) log|9^(x)+sqrt(9^(x)-1)|+c`

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The correct Answer is:

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