Math, asked by sunandadate123, 5 months ago

Which term of AP:21,18,15, ……………………….. is -81.​

Answers

Answered by ssarkar110305
1

Answer:

a=21

d=-3

an=-81

an=a+(n-1)d

-81=21-3n+3

-81=24-3n

-105=-3n

n=35

pls mark this as brainliest

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