Math, asked by anveshabhoi123, 13 hours ago

If the last term of the AP -9,-5,-1 is 67 then how many terms are there in AP.​

Answers

Answered by Ajit0701
2

Answer:

20

Step-by-step explanation:

Common difference=-5-(-9)=4

Last term =67=a+(n-1)d

=67=-9+(n-1)*4

n-1=76/4

n=19+1=20

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