1.

If the arithmetic and geometric means of a and b be \[A\] and \[G\] respectively, then the value of \[A-G\] will be

A. \[\frac{a-b}{a}\]
B. \[\frac{a+b}{2}\]
C. \[{{\left[ \frac{\sqrt{a}-\sqrt{b}}{\sqrt{2}} \right]}^{2}}\]
D. \[\frac{2ab}{a+b}\]
Answer» D. \[\frac{2ab}{a+b}\]


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