Prove that; nC0 + nC2nC4 = 2n -1

Hi, Consider, 1+xn= C0+C1x+C2x2+......+CnxnPutting x = 1 2n= C0+C1+C2+......+CnPutting n = -1 0=C0-C1+C2-......+CnAdding both, we get 2n=2C0+C2+.....+..C0+C2+.....+..= 2n2= 2n-1Regards

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