1.

The sum of the series 2C0+C12⋅22+C23⋅23+C34⋅24+⋯+Cnn+1⋅2n+1 is equal to , where(Cr=nCr)

Answer»

The sum of the series 2C0+C1222+C2323+C3424++Cnn+12n+1 is equal to , where(Cr=nCr)



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