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.
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
Didnt think it would be that difficult to be honest with you guys.
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