1.

The value of $$\frac{1}{{\sqrt {3.25}+ \sqrt {2.25} }}$$$$ +\, \frac{1}{{\sqrt {4.25}+ \sqrt {3.25} }}$$$$ +\, \frac{1}{{\sqrt {5.25}+ \sqrt {4.25} }}$$$$ +\, \frac{1}{{\sqrt {6.25}+ \sqrt {5.25} }}$$  is = ?

A. 0
B. 0.25
C. 0.5
D. 0.25
Answer» B. 0.25


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