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Let G be the geometric mean of two posit...

Let G be the geometric mean of two positive numbers a and b, and M be the arithmetic mean of `(1)/(a) and (1)/(b)`. If `(1)/(M):G` is `4:5`, then a: b can be

A

`1:4`

B

`1:2`

C

`2:3`

D

`3:4`

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The correct Answer is:
A
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AAKASH SERIES-SEQUENCE AND SERIES-Practice Exercise
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