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a + b =  2 ( <math>\sqrt{ab}</math> + 2 )-------> 1<br>
 
a + b =  2 ( <math>\sqrt{ab}</math> + 2 )-------> 1<br>
 
H.M is one – fifth larger number . Here 'a' is larger number so,<br>
 
H.M is one – fifth larger number . Here 'a' is larger number so,<br>
H.M = <math>\frac{1} {5}</math> a
+
H.M = <math>\frac{1} {5}</math> a<br>
 +
<math>\frac{2ab} {a + b}</math> = <math>\frac{1} {5}</math> a
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