If a ,b,c,d are in G.P. then(b-c)^(2)+ (...

If a ,b,c,d are in G.P. then`(b-c)^(2)+ (c-a)^(2) -: (d-b)^(2) =`

A

`(a-d)^(2)`

B

`(a d)^(2)`

C

`(a+d)^(2)`

D

`(a//d)^(2)`

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The correct Answer is:

A

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