Question: 2.68 Show that, for any integer n1,a.(nn)=1. Interpret this result.b.(n0)=1. Interpret this result.c.(nr)=(nn-r). Interpret this result.d.i=0n(ni)=2n(x+y)n with x=y=1.

2.68 Show that, for any integer n1,a.(nn)=1. Interpret this result.b.(n0)=1. Interpret this result.c.(nr)=(nn-r). Interpret this result.d.i=0n(ni)=2n(x+y)n with x=y=1.

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