Question

The nth term of an A.P is (7 – 4n). Find its common difference.​

Answer 1

Answer:

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:

-4

Step-by-step explanation:

for first term a=7-4(1)

                        =3

for second term a2= 7-4(2)

                                   =-1

d= a2-a =-1-3

            =-4

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