I am to evaluate the following:
This is the one I can't figure out
the coefficient of x7y2 in the expansion of (2x-y)9
any help is appreciated
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Hello, papa_chango123! Evaluate: . . . Answer: 21 . . . Right! . . Answer: 66 . . . no Find the coefficient of in the expansion of
You're expected to know the Binomial Expansion.
The term with is: .
Hence, we have: .
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