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bug in Mathematica?


Hi Everyone


The code

Sum[Binomial[m, j], {j, 1, m - 1}]

produces the correct value -2+2^m.


But the code

Product[Binomial[m, j], {j, 1, m - 1}]

creates the wrong value of zero. Does anyone have an explanation for why 
this is happening?


Thanks and best regards

Hansrued Widmer






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