Prove that the coefficient of xn in the binomial expansion of (1+x)2n – InterviewSolution

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1.	Prove that the coefficient of xn in the binomial expansion of (1+x)2n is twice the coefficient of xn in the binomial expansion of (1+x)2n−1.
Answer» Prove that the coefficient of $x^{n}$ in the binomial expansion of $(1 + x)^{2 n}$ is twice the coefficient of $x^{n}$ in the binomial expansion of $(1 + x)^{2 n - 1}$ .

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