Question

find the seven terms of an arithmetic progression 40,15,10,35​

Answer 1

Common difference d= 3a- a = 2a. Therefore the nth term of the A.P. is (2n-1)a

Answer 2

Answer:

d= 15-40

= -25

a=40

a7=?

An=a + (n-1) d

therefore, a7= 40 +(7-1) (-25)

=40+6×-25

=40-150

=-110

Therefore, the seventh term is -110.

Thank you.

Hope it helps you.