Write first four terms of the AP, when the first term a and the common difference d are given as follows:
a = 10, d = 10
Given that first term (a) = 10
Common difference (d) = 10
The first four terms of the A.P is given by
a, a+d, a+2d, a+3d
⇒ 10, 10+10, 10+2×10, 10+3×10
⇒ 10, 20, 30, 40