Question

Find the common difference if nth term of ap is 7-4n

Answer 1

We know that n= 7-4n
If n=1
=7-4=3
If n=2
= 7-4×2= -1
If n=3
= 7-4×3 = -5
Then A.P. will be 3, -1 , -5 .
d = a2 -a1
= -1 -(3)
= -4