Question

how many terms of the A.P. 22,20,18..... should be taken so that their sum is zero
​

Answer 1

Answer:

let a=22

d=-2

22+(n-1)-2=0

22-2n+2=0

-2n=-24

n=12

12/2(2*22+(12-1)*-2) =0

6(44-22)

6*22

=132