SOLUTION: Write the series with summation notation: -1+8-27+64-125

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Question 952846: Write the series with summation notation:
-1+8-27+64-125
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
-1+8-27+64-125
-1 = (-1)113

+8 = (-1)223

-27 = (-1)333

+64 = (-1)443

-125 = (-1)553

So the kth term is

(-1)kk3

And the sum is



Edwin