Homework Help: Math

Posted by Maggie on Saturday, May 24, 2008 at 1:49pm.

Need help I have to find a pattern for

8, -1, 2, -1

I know the answer is 1/3 but have no idea how I get there...I am trying to multiply each by -1/2 but I can't get the 1/3 at the end for some reason

and I have the similar problem as well:
8, -4, 2, -1

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