Math, asked by beetaa131, 6 months ago

24. Which term of the AP 21, 18, 15,.... is zero?

Answers

Answered by merinjoji20

0

Answer:

8

a=21

d= -3

an = a + (n-1)d

0 = 21 + (n-1)-3

-21 = -3n+3

-21-3= -3n

-24 = -3n

n= 8

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