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MATH QUESTION.... Find the coefficient of x^39 in (x-1)^41?
Find the coefficient of x^39 in (x-1)^41
help is appreciate, thanks
2 Answers
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- 9 years agoFavorite Answer
The only time there is a coefficient of x^39, is when x is to the power of 39, right?
In the binomial expansion, you would need to do:
41C2 * (x)^39 * (-1)^2 = 820 * x^39 * 1 = 820x^39
So the coefficient is 820 :)
- ?Lv 59 years ago
coefficient of x^39 in
(x-1)^41
=41c2*(-1)^2
=41!/(39!*2!)*(1)
=(41*40)/2
=41*20
=820
Good luck !
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