how many terms of the AP 72,69,66,..make the sum 897 ?
Answers
Answered by
25
Hey mate here is your solution ...number of terms will be 23 ....
Plz mark me as a brainist and dont forget to follow me...thnx
Plz mark me as a brainist and dont forget to follow me...thnx
Attachments:
Answered by
6
Given :
AP:72,69,66,..
To Find:
how many terms of the AP 72,69,66,..make the sum 897 ?
Solution:
AP:72,69,66,..
First term = a = 72
Common difference = d = 69-72=66-69=-3
Formula of sum of first n terms :
We are supposed to find how many terms of the AP 72,69,66,..make the sum 897 ?
So,
n= 23,26
Since the sum of 23 terms is equal to the sum of 26 terms
So, 23 terms of the AP 72,69,66,..make the sum 897
Similar questions