Math, asked by ibrahims7353, 1 year ago

Which term of so 21, 18, 15 is -81

Answers

Answered by rahuladya2405

0

Answer:

here a=21 d=-3

An=a+(n-1)d

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

-102=-3n+3

-102-3=-3n

-105=-3n

n=35

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