Question

In an AP the sum of the first 10 term is minus 150 and the sum of the next 10 term is minus 550 find the AP​

Answer 1

hope this helps you!

Answer 2

Answer:

Step-by-step explanation:

n = no. Of terms

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

10/2(2a+9d)

= 5(2a+9d)= -150

2a+9d= 30_eq1

20/2 (2a+19d)=-700

2a+19d=-70_eq2

Eliminating eq1 and eq2

-10d= 40

d= -4

2a -36=-30

2a=6

a=3

Therefore the AP is 3,-1,-5,-9........