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If the nth term of an A.P. is t(n) =3 -5...

If the nth term of an A.P. is `t_(n) =3 -5n`, then the sum of the first n terms is ………

A

`n/2 [1-5n]`

B

`n(1-5n)`

C

`n/2 (1+5n)`

D

`n/2(1+n)`

Text Solution

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The correct Answer is:
A
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