If $x$ is positive, then $\dfrac1{\sqrt{x+1}+\sqrt{x}}=$

If $x$ is positive, then $\dfrac1{\sqrt{x+1}+\sqrt{x}}=$

A) $1$

B) $x$

C) $\dfrac1{x}$

D) $\sqrt{x+1}-\sqrt{x}$

E) $\sqrt{x+1}+\sqrt{x}$

Answer: D

Source: Veritas Prep

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