Question

Find the sum of the first 22 terms of the Ap: 8,3,-2.....

Answer 1

Answer:

Hey mate

I will help u

Answer

-979

Step-by-step explanation:

.

Here

a= 8

d= 3-8=5

n=22

Therefore by using the formula

$s = \frac{n}{2} (2a + (n - 1)d)$

S= 22/2(16+21*-5)

= 11(16-105)

=11 ( - 89)

S22= - 979[/tex]

Hp

Answer 2

Answer:

first term = 8

common difference = 3-8

=-5

S22= n/2[2a + (n-1).d]

= 22/2[ 2.8 + (22-1).-5]

11[16+21*-5]

11[ 16-105]

11[ -89]

-979

S22= -979

hope it will help you