Asked by El chapo

the sum of the 1st 8 terms of an AP is 80 and the sum of the next 4 terms is 88. determine the AP?
Answered by oobleck
8/2 (2a+7d) = 80
12/2 (2a+11d) - 80 = 88

Now just solve for a and d.
Answered by Deborah
Which formula am I going 2 use
Answered by Samuel
How are am I going to do this
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