2007-09-19 14:20:33 · 5 answers · asked by hanna 1 in Science & Mathematics ➔ Mathematics
All real numbers except where the denominator is 0.
x^2 - 4x = 0
<=> x (x-4) = 0
<=> x = 0 or 4.
So the domain is all real numbers except 0 and 4.
2007-09-19 14:26:25 · answer #1 · answered by Scarlet Manuka 7 · 0⤊ 0⤋
The denominator of a fraction can not be zero therefore
x^2-4x can not = 0
factoring and solving for x...
x(x-4) can not = 0
so x can not = 0 and x can not =4
Domain is all real numbers except 0 and 4
2007-09-19 14:26:41 · answer #2 · answered by RickSus R 5 · 0⤊ 0⤋
All real numbers can be the input. There are no fractions. No imaginary no's. All real numbers could fill this rule. Hopefully this is a one-to-one function. That is another story!
2007-09-19 14:28:01 · answer #3 · answered by gzlakewood@sbcglobal.net 4 · 0⤊ 0⤋
all real numbers, except 4 because you cannot divide anything by 0
2007-09-19 14:24:18 · answer #4 · answered by Salad 4 · 0⤊ 1⤋
yes, naw just playing the piano
2007-09-19 14:24:14 · answer #5 · answered by Anonymous · 0⤊ 1⤋