Question

The middle term of an ap is 52. Find the sum of its first and last term​

Answer 1

Answer:

Answer

Given a

10

=52

a

n

=a+(n−1)d

52=a+9d(1)

also, a

17

=20+a

13

a+16d=20+a+12d

4d=20

d=5(2)

From (1) and (2)

52=a+9×5

a=7

The AP is: 7,12,17,22,...