Question

The nth term of an Arithmetic progression is given by a =7 - 4n then the common
difference is
A 4
B. -4
C. 3
D. -3​

Answer 1

N

th

term=a

n

=7−4n

First term=a

1

=7−4(1)=7−4=3

Second term a

2

=7−4(2)=−1

∴ Common difference=Secondterm−Firstterm

=(−1)−3=−4

Answer 2

Answer:

B. -4 is the correct option.

Just see the attachment for further references.