Question

find the first four terms of AP ,when first term a & the common difference d are given as follow. a= 10, d= 10

Answer 1

general form for any AP is given as a+(n-1)d

hence ,

n=1, 10+0 = 10

n=2, 10+10=20

n=3, 10+20=30

n=4, 10+30=40

First four terms are 10,20,30,40