SOLUTION: first term a, common difference d the sum of the first 200 terms is 4 times the sum of the first 100 terms -find d in terms of a -find the 100th term in terms of a

Question 933070: first term a, common difference d
the sum of the first 200 terms is 4 times the sum of the first 100 terms
-find d in terms of a
-find the 100th term in terms of a
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
The sum of the first terms is
, so
the sum of the first terms is
, and
the sum of the first terms is
.
Since the sum of the first 200 terms is 4 times the sum of the first 100 terms,

The therm is , so the term is
.
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