Question

find the sum of first 30 terms of the Ap:1+5+9+13+......​

Answer 1

Step-by-step explanation:

tn =4n -3

hope you will be able to get the answer to your question mate

Answer 2

Given:

a = 1

d = 5 - 1 = 4

n = 30

Sn = n/2(2a + (n - 1)d)

S30 = 30/2 (2*1 + (30 - 1)*4)

S30 = 15*(2 + (29)*4)

S30 = 15*(2 + 116)

S30 = 15*118

S30 = 1770 ——> Answer