SOLUTION: find the coefficient of x^2 in the expansion of {x - 1/2(x^2)}^20

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Question 1117567: find the coefficient of x^2 in the expansion of {x - 1/2(x^2)}^20
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


To get an x^2 term, you need to take the "x" term 14 times and the "1/x^2" term 6 times:

%28x%5E14%29%2A%281%2Fx%5E2%29%5E6+=+x%5E14%2Fx%5E12+=+x%5E2

So the x^2 term in the expansion is