int (dx)/(sqrt(x) (x+9))) is equal to...

`int (dx)/(sqrt(x) (x+9)))` is equal to

`2/3 tan^(-1)sqrt(x)+c`

`2/3tan^(-1)(sqrt(x)/3)+c`

`tan^(-1)sqrt(x)+c`

`tan^(-1)(sqrt(x)/3)+c`

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The correct Answer is:

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