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If in an AP , S(n)= Qn^(2) and S(m) =...

If in an AP , `S_(n)= Qn^(2)` and ` S_(m) =qm^(2)` , where `S_(r)` denotes the of r terms of the AP , then `S_(p) ` equals to

A

`q^3/2`

B

mnq

C

`q^3`

D

`(m+n)q^2`

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