If \( H \) be the H.M. between \( a \) and \( b \), then the value of \( \frac{H}{a}+\frac{H}{b}...

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If \( H \) be the H.M. between \( a \) and \( b \), then the value of \( \frac{H}{a}+\frac{H}{b} \), is
(A) 2
(B) \( \frac{a b}{a+b} \)
(C) \( \frac{a+b}{a b} \)
(D) none of these
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