1.

What is the simplified value of \(\frac{1}{{\sqrt {25} - \sqrt {24} }} - \frac{1}{{\sqrt {24} - \sqrt {23} }} + \frac{1}{{\sqrt {23} - \sqrt {22} }} - \frac{1}{{\sqrt {22} - \sqrt {21} }} + \frac{1}{{\sqrt {21} - \sqrt {20} }}?\)

A. 5 + 2√5
B. 5 - 5√2
C. √25 + √21
D. √25 - 4
Answer» B. 5 - 5√2


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