(1/2003-1) (1/2002-1) (1/2001-1).(1/1000-1)
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![(1/2003-1) (1/2002-1) (1/2001-1).(1/1000-1)](/uploads/image/z/263360-56-0.jpg?t=%281%2F2003-1%29+%281%2F2002-1%29+%281%2F2001-1%29.%281%2F1000-1%29)
(1/2003-1) (1/2002-1) (1/2001-1).(1/1000-1)
(1/2003-1) (1/2002-1) (1/2001-1).(1/1000-1)
(1/2003-1) (1/2002-1) (1/2001-1).(1/1000-1)
(1/2003-1) (1/2002-1) (1/2001-1).(1/1000-1)
=(-2002/2003)*(-2001/2002)*(-2000/2001)*...*(-999/1000)
=999/2003