SOLUTION: What is the middle term in the expansion of {{{ (x-1/x)^6)}}}

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Question 375306: What is the middle term in the expansion of +%28x-1%2Fx%29%5E6%29
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The expansion has 7 terms, so we need the fourth term:
C%286%2C3%29%2Ax%5E3%2A%281%2Fx%29%5E3+=+20x%5E3%2A%281%2Fx%5E3%29+=+20.