Integral of 1/((x + p) sqrt(x + 1)) by putting x + 1 = t^2

1. A.
   $\tan^{- 1}\left( \frac{1}{3} \right)$
2. B.
   $2\tan^{- 1}\left( \frac{1}{3} \right)$
3. C.
   $3\tan^{- 1}\left( \frac{1}{3} \right)$
4. D.
   $4\tan^{- 1}\left( \frac{1}{3} \right)$

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1. A.
   $\dfrac{1}{2}\log\dfrac{5}{3}$
2. B.
   $\dfrac{1}{3}\log\dfrac{5}{3}$
3. C.
   $\dfrac{1}{2}\log\dfrac{3}{5}$
4. D.
   $\dfrac{1}{5}\log\dfrac{3}{5}$

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