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# a, b are positive numbers Which one is bigger? (a^-1+b^-1)

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a, b are positive numbers Which one is bigger? (a^-1+b^-1) [#permalink]

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08 Jul 2004, 16:24
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a, b are positive numbers Which one is bigger? (a^-1+b^-1) ^-1 or (a^-1 * b^-1)
1) a=2b, 2) a+b>1
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09 Jul 2004, 06:29
(E)

Two numbers are:
ab/(a+b) and 1/ab

1: Insufficient
2: Insufficient

Combining:
we get b>1/3

Two numbers again after placing the value
2b/3 and 1/2b^2
which have the critical value 3/4

So Insufficient.

Correct me if I am wrong.
09 Jul 2004, 06:29
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