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$\int \frac{dx}{\sqrt{x+1}-\sqrt{x}}$ equals:
Difficulty: Easy
A: 
$\frac{2}{3}(x+1)^{\frac{3}{2}}+x^{\frac{3}{2}}$
B: 
$ln\sqrt{(x+1)}-\sqrt{x}$
C: 
$\frac{1}{(\sqrt{x+1}-\sqrt{x}^{2})$
D: 
$\frac{2}{3}(x+1)^{\frac{3}{2}}+\frac{2}{3}x^{\frac{3}{2}}$
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