Question

Find the sum of the first 22 terms of the AP: 8,3,-2​

Answer 1

Answer:

Step-by-step explanation:

n=22

a=8

d=3-8=-5

Sn=n/2(2a+(n-1)d)

=22/2(16+21×(-5))

=11×(-89)

=-979

Answer 2

Answer:

Step-by-step explanation:

S22=?

Sn=n/2(2a+(n-1)d)

Ap- 8,3,-2

A1=8

D=3-8=-5

N=22

S22=22/2(2(8)+(22-1)-5)

11(16+(21)-5)

11(16-105)

11(-89)

-979