Question

If the n th term of an ap is(7-4n), then its common difference is *

Answer 1

Answer:

Step-by-step explanation:

an=7-4n

Substitute n by 1

a1=7-4*1=7-4=3

Substitute n by 2

a2=7-4*2= 7-8= -1

d=a2-a1= -1-3=-4

Answer 2

Answer:

-4

Step-by-step explanation:

$d = a_n-a_{n-1}\\\\Given \\\\a_n = 7-4n\\\\a_{n-1}=7-4(n-1)=11-4n\\\\d = (7-4n)-(11-4n)$

Hope it Helps