Question

Sum of the first n terms of an
Apa,a+d,a+2d,. is
option:A n÷2(a+(n-1)d)
option:B n÷2(2a+(b-1)d)
option:c n÷2(2a+(n+1)d)
option:D n÷2(a+(n+1)d)
​

Answer 1

Answer:

n÷2[2a+(n-1)d]

but this is not in option

Answer 2

Answer:

Hello friend

Answer : correct option is not given

Explanation:

According to formula defined in ncert

sum of first n terms = n÷ 2 (2a +(n-1)d)