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Question 1
The value of the sum $\frac{1}{2\sqrt{1}+1\sqrt{2}}+\frac{1}{3\sqrt{2}+2\sqrt{3}}+\frac{1}{4\sqrt{3}+3\sqrt{4}}+...+\frac{1}{25\sqrt{24}+24\sqrt{25}}$ is
A.
$\frac{9}{10}$
B.
$\frac{4}{5}$
C.
$\frac{14}{15}$
D.
$\frac{7}{15}$
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