Question

3 term of an ap is 12 more than its first term and if it's last term is205 find the number of terms in ap​

Answer 1

Answer:

Given

3rd term is 12 more than first term

So, a + 2d = a + 12

2d = 12

d = 6 , a = 1

It is given last term 205

Then

205 = a + (n-1) d

205 = 1 + (n-1) 6

(205-1)/6 = n-q

34 = n-1

n = 35

no.of terms are 35

Hope this helps you