Question

find the number of terms of the AP 7,13,19,...205

Answer 1

Answer:

A n = 205

a = 7

d = 6

A n = a + (n-1)d

205 = 7 + (n-1)6

205 = 7 + 6n - 6

205 = 1 + 6n

204 = 6n

n = 204/6

n = 34

Total number of terms is 34.