document.write( "Question 744973: Find the domain of rational function f(y)=(y+4)/(y^2-4y) \n" ); document.write( "
Algebra.Com's Answer #453633 by josgarithmetic(39617)\"\" \"About 
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The denominator is also y*(y-4).
\n" ); document.write( "y can be of the real numbers so that \"y%3C%3E0\" and \"y%3C%3E4\".\r
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\n" ); document.write( "\n" ); document.write( "Your use of 'y' as the independent variable in the function f indicates that the domain must be for y. The intent to use y instead as the dependent variable would be very dubious for the given rational function.
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