Question

the nth term of sn AP is 7-4n. Find its common difference​

Answer 1

Answer:

Step-by-step explanation:

nth term of an AP = 7 -4n

e.g Tn = 7 -4n

put n = 1 then T1 = 7 - 4= 3

put n = 2 then T2 = 7 -4× 2 = 7-8 = -1

common difference = T2 - T1 = -1 -3 = -4

hence common difference = -4