Question

find the 8th term of ap 21,18,15=ans=0the full anser please​

Answer 1

Step-by-step explanation:

Answer. The given Arithmetic Progression is 21, 18, 15,…,0,…. We need to find n. => The 8th of the given Arithmetic Progression is 0.

Answer 2

Step-by-step explanation:

a1= 21

a2= 18

a3= 15

d= a2-a1 = 18-21 = -3

nth term is 0

an = a+(n-1)d

0 = 21 +(n-1)(-3)

0 = 21- 3n+3

0 = 24-3n

-24= -3n

n= 24/3

n= 8

8th of the term is 0