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If m is a positive integer and Dr=|2r...

If `m` is a positive integer and `D_r=|2r-1\ ^m C_r1m^2-1 2^m m+1s in^2(m^2)s in^2(m)s in^2(m+1)|` . Prove that `sum_(r=0)^m D_r=0` .

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