For the following arithmetic progressions write the first term a and the common difference d:$-5, -1, 3, 7, …………$

Given:

Given A.P. is $-5, -1, 3, 7, …………$.

To do:

We have to write the first term a and the common difference d.

Solution:

In the given A.P.,

$a_1=-5, a_2=-1, a_3=3$

Therefore,

First term $a=a_1=-5$
Common difference $d=a_2-a_1=-1-(-5)=-1+5=4$.

The first term $a$ is $-5$ and the common difference $d$ is $4$.