Question

Which term of the AP:21, 18, 15, ... is -81?
Is there any term 0?Give reason for your answer.​

Answer 1

Answer:

35th term of an ap is -81

8th term of the ap will be 0

Step-by-step explanation:

a=21

d=-3

an=a+(n-1)d

-81=21+(n-1)-3

-81-21=3-3n

-105=-3n

n=35

an=0

0=21+3-3n

n=8