1.

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

Answer»

`(a + B)^(2) + (C + d)^(2) + 2(b + c)^(2)`
`(a + b)^(2) + (c + d)^(2) + 2(a + c)^(2)`
`(a + b)^(2) + (c + d)^(2) + 2(b + d)^(2)`
`(a + b)^(2) + (c + d)^(2) + (b + c)^(2)`

ANSWER :A


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