Question

Determine the ap whose fourth term is 18 and the difference of the ninth term from the fifteenth term is30

Answer 1

Hey

Here is your answer,

4th term = a+3d.......(1)

(a+8d)-(a+14d) = 30
a+8d-a-14d=30
6d=30
d=30/6
d=5........put in eq.(1)

a+3×5=18
a+15=18
a=18-15
a=3

A.P.=a,a+d,a+2d
=3,3+5,3+10
=3,8,13.

Hope it helps you!

Answer 2

Step-by-step explanation:

hope this will help you . please mark it as brainliest.