Question

Q1. The 9th term of an A.P. is 30 and the 17th term is 50.
Find the first three terms.

Answer 1

Answer:

a9=a+8d=30...1

a17=a+16d=50...2

by alimination method

sub 1 and 2

d=2.5, a=10

a1=10

a2=a+d=12.5

a3=a+2d=15