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What is the formula to find the sum of A...

What is the formula to find the sum of AP to `n` terms ?

A

`S_(n) = (n)/(2) [ a+ (n-1) d]`

B

`S_(n) = (n)/(2) [2a + nd]`

C

`S_(n) = (n)/(2) [ a+ (n+1) d]`

D

`S_(n) = (n)/(2) [ 2a+ (n-1) d]`

Text Solution

Verified by Experts

The correct Answer is:
D
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