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  • Użytkownik Zadane
2009-12-02T19:11:48+01:00
4/x*(x-1) = 4/-2 *(-2-1)= 4/-6=-2/3
3 2 3
2009-12-02T19:12:19+01:00
4/x-1 - 4/x= 4x/x(x-1) - 4(x-1)/x(x-1)= 4x/x^-x - 4x-4/x^-x= -4/x^-x
x=-2= -4/-2^-2= -4/2= -2
4 1 4
2009-12-02T19:15:35+01:00
4x/(x-1)x - 4(x-1)/(x-1)x= (4x-4x+4)/(x-1)*x= 4/(x-1)x

dla x=-2:

4/(-2-1)*(-2)= 4/6=2/3
5 5 5