Question

Find the 20th term of an AP , , , … ….​

Answer 1

Answer:

Ap :- 10,7,4

a(1)=10 ,a(2) =7

common difference(d)= a(2) - a(1)

d=10-7= -3

a(20)=a+19d

=10 +19×-3

=10- 57

=-47

Hence 20 th term of given Ap is -47.