1.

If (1+x)n=C0+C1x+C2x2+........+Cnx2, then C20+C21+C22+C23+..........+C2n =

Answer»

If (1+x)n=C0+C1x+C2x2+........+Cnx2, then

C20+C21+C22+C23+..........+C2n =




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