(a-1 +b-1 )-1 [a >0, b >0 ]
Correct Answer: Option A
(a + b ) [a>0, b>0 ] < a b 0
= \((\frac{1}{a} + \frac{1}{b}) - 1\)
= \((\frac{{a + b}}{{ab}}) - 1 = \frac{{ab}}{{a + b}}\)
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