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If-n-N-then-the-sum-of-the-coefficients-in-the-expansion-of-the-binomial-5x-4y-n-is-




Question Number 63836 by gunawan last updated on 10/Jul/19
If n ∈ N, then the sum of the coefficients  in the expansion of  the binomial  (5x−4y)^n  is
IfnN,thenthesumofthecoefficientsintheexpansionofthebinomial(5x4y)nis
Commented by kaivan.ahmadi last updated on 10/Jul/19
x=y=1⇒(5−4)^n =1
x=y=1(54)n=1

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