1.

If a,b,c are in G.P and A.M of a and b is x and A.M. of b and c is y then…….

Answer»

`(1)/(X) + (1)/(y)=2`
`(1)/(x) + (1)/(y) = (1)/(2)`
`(1)/(x) + (1)/(y) = (2)/(a)`
`(1)/(x) + (1)/(y) = (2)/(B)`

ANSWER :D


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