Question

an=7-4n ,find common difference ​

Answer 1

Answer:

Nth term=an =7−4n

First term=a1 =7−4(1)=7−4=3

Second term a2 =7−4(2)=−1

∴ Common difference=Secondterm−Firstterm

=(−1)−3=−4

Answer 2

Answer:

the common difference is -4

Step-by-step explanation:

Here Aₙ=7-4n -------(1)

Put n=1 in the above equation(1)

A₁=7-4=3

Put n=2 in the above equation(1) then

A₂=7-8=-1

As we know a common difference (d)=A₂-A₁

d= -1-3= -4