SOLUTION: write the general term for: 2, -5, 8, -11, .....

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Question 1064681: write the general term for:
2, -5, 8, -11, .....
Answer by Edwin McCravy(20060)   (Show Source): You can put this solution on YOUR website!

First we get the general term for 2, 5, 8, 11, ... 
which is an arithmetic sequence and has general term 









Now we multiply that general term by the sign-alternating 
factor (-1)n+1.  We'll call the general term tn.

 

Edwin
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