Question

an
if the 4th Term of
AP is (un-7), then what is
its common difference?​

Answer 1

Explanation:

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