Question

find the 15th term of the ap 3,6,9....using suitable formula​

Answer 1

Explanation:

Given:-

a=3

d=6-3=3

n=15

an=?

an=a+(n-1)d

an=3+(15-1)3

an=3+42

an=45

Answer 2

Answer:

a=3, d=3

t15=a+(n-1)d

t15=3+(15-1)3

t15=3+14×3

t15=3+42

t15=45

Explanation:

15th term of this ap is 45