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Murr
Questions (2)
1-2-3-4+...+1997-1998+1999-2000=
A) -2000 B) -1000 C) -1 D) 0
1 answer
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If a, b, c, d are 4 different numbers, then the line joining R(-a,b) and S(-c,-d) has the same slope as the line joining T(a,-d)
1 answer
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