1.

If a, b, c are in H.P, then the value of(1/(b) + 1/(a) - 1/(c)) (1/(b) + 1/(c) -1/(a) ) is

Answer»

`3/b^2-2/(AB)`
`a^2+b^2+C^2`
`2/(BC)-1/b^2`
both (a) and (c)

ANSWER :D


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