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In an A.P. with first term 'a' and commo...

In an A.P. with first term 'a' and common difference 'd' `t_(2n) - t_(n) ` is : (where `t_(n) " is the " n^(th)` term )

A

nd

B

`(2n - 1) `d

C

`(n -1)` d

D

`a + nd`

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The correct Answer is:
A
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