Math, asked by madhualuvala2784, 10 months ago

21,18,15,......which term is equl to-81

Answers

Answered by VishnuPriya2801

1

Step-by-step explanation:

a(n)=a+(n-1)d

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

-81=21-3n+3

-81=18-3n

-81-18= - 3n

-99=-3n

n= -99/-3

n=33

Therefore , -81 is 33rd term

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