Question

The n th term of an ap is 7-4n. Find common difference?

Answer 1

Step-by-step explanation:

Given nth term of an AP is 7-4n

an=7-4n

Put n=1 in , we get

a1=7-4(1)

7-4=3

Put n=2 in , we get

a2=7-4(2)

7-8=-1

Common difference d=a2-a1

-1-3=-4

Hence the common difference of the AP is -4

Answer 2

Answer:

-4

Step-by-step explanation:

an =7-4n

put n=1 in an, we get

a1=7-4=3

put n=2 in an, we get

a2=7-4(2)

=7-8

=-1

common difference

d=a2-a1

=-1-3

=-4

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