Question

The number of terms of an AP 5,9,13, .....185 is a)31
b)51
c)41 d) 40

Answer 1

Answer:

n=45

Step-by-step explanation:

an=a+(n-1)d

an=185 185=5+(n-1)4

d=4 = 5+4n-4

a=5 =5+4n

185-5+4n

4n=180

n=180/4

n=45