Question

Find the number of terms in the A.P. 3, 6, 9, 12,..., 111.​

Answer 1

Step-by-step explanation:

last term = a+(n-1)d = 111

a=3, d =9-6 = 6-3 =3

3+(n-1)3 = 111

3(1+(n-1)) =111

1+n-1 = 111/3 = 37

n = 37