Question

the of h th term a.p. is 4 n+1 find the 9 th term

Answer 1

n th term of AP, An = 4n+1
9 th term of AP, A9 = 4(9)+1 = 37

Answer 2

4n+1
n=1. 4×1+1=5
n=2. 4×2+1=9
n=3. 4×3+1=13

so its make a AP= 5,9,13
a=5
d=9-5
=4
9th term=a+8d
=5+8×4
=5+32
=37