Question

Which term of AP 21,18,15....... Is - 81

Answer 1

Answer:

answer is 34

Step-by-step explanation:

a1=21

a2=18

d=a2-a1

18-21=-3

d=-3

an=-81

n=??

an=a+(n-1)d

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

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

- 102/-3=n-1

34=n-1

n=34+1

n=35

so,the term is 35

Answer 2

plz refer to this attachment