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

1.	Prove that the coefficient of x n in the expansion of (1 + x ) 2 n is twice the coefficient of x n in the expansion of (1 + x ) 2 n –1 .
Answer» Prove that the coefficient of x n in the expansion of (1 + x ) 2 n is twice the coefficient of x n in the expansion of (1 + x ) 2 n –1 .

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