Math, asked by rmrahulmeena1, 1 year ago

The first and last term of A.P. are 1 and 11 . If sum of its terms is 36 then number of terms will be ?

Answers

Answered by cbpjnvp9751k
5
It will be 6

S = n/2(a+l)

Answered by Anonymous
10
we know that,

Sn = n/2 ( a+ l )

Given :-

a = 1

l = 11

Sn = 36.

➡ 36 = n/2 ( 1 + 11 )

➡ 36 * 2 = 12n

➡ n = 6.

so, no of terms (n) = 6.

Hope it will help you !!!

rmrahulmeena1: thanks
Anonymous: your welcome
Similar questions