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If the first term of an AP is -5 and the...

If the first term of an AP is -5 and the common difference is 2, then the sum of the first 6 terms is

A

0

B

5

C

6

D

15

Text Solution

Verified by Experts

The correct Answer is:
A
Given, `a= -5` and `d=2`
` :. S_(6)=(6)/(2)[2a+(6-1)d] " " [ :' S_(n)=(n)/(2){2a+(n-1)d}]`
` " " =3[2(-5)+5(2)] " " =3(-10+10)=0`
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