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Write the first four terms of the A.P. when first term a and common difference d are given as follows:

a = 100, d = -30

Answer :

Given: a = 100 and d = -30

The general form of an A.P is a, a+d, a+2d, a+3d,…

So, the first term a is 100 and the common difference d is -30, then the first four terms of the AP is

100, (100+(-30)), (100+2×(-30)),(100+3×(-30))

100, (100 – 30), (100 – 60), (100 – 90)

100, 70, 40, 10

Hence, first four terms of the A.P. is 100, 70, 40 and 10.

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