Asked by Andrew
The first term of an arithmetic progression is 6 and the sum of the first twelve terms is -192. Find the common difference.
Answers
Answered by
oobleck
you know that
12/2 (2*6 + 11d) = -192
so now just solve for d.
12/2 (2*6 + 11d) = -192
so now just solve for d.
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