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ulissess
#26
Dec6-10, 04:27 PM
P: 36
Z=(x+y)/(x-y)

D: {R^2 \ (x-y[tex]\neq[/tex]0)} so if y=0.5 ==> x[tex]\neq[/tex]0.5

why is it important ? Is the range all the values x-y[tex]\neq[/tex]0 ?