document.write( "Question 629327: What is the domain of the function f(x) = 3x? \n" ); document.write( "
Algebra.Com's Answer #396194 by jim_thompson5910(35256)\"\" \"About 
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You can plug in any real number and get some real number as an output.\r
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\n" ); document.write( "\n" ); document.write( "So the domain is the set of all real numbers\r
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