can someone help me find the coefficient of in : I cant seem to find how to switch it up, I know the answer but just now how to get to it.
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You want the coefficient of in the expansion of . We can get from: Find out how many ways to rearrange each of those strings and add it up.
Note that: Now remember that: ( ) So we get; For our coefficient is enough to consider: And thus the coefficient is: A longer way, but still the same result
thanks guys! Didnt think it would be that difficult to be honest with you guys.
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