How do I evaluate without havng to add up each element? Thanks
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Originally Posted by chancey How do I evaluate without havng to add up each element? Thanks This is a geometric series. --- Thus, Use geometric sum formula, Simplify,
Originally Posted by ThePerfectHacker This is a geometric series. --- Thus, Use geometric sum formula, Simplify, Right, but thats not the answer in the back of the book... I did it this way: Which is the same answer as yours, however the answer in the book says . They must of added the 20 instead of subtracted it. OK thanks
Originally Posted by chancey Right, but thats not the answer in the back of the book... I did it this way: Which is the same answer as yours, however the answer in the book says . They must of added the 20 instead of subtracted it. OK thanks Then the book is inncorect.
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