document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=942429>Question 942429</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.)Is the interval [0,1] closed under multiplication. ? Is yes, why? If no, give explanation<BR>\n" );
document.write( "2.)is the interval [0,1] closed under subtraction if yes or no why?<BR>\n" );
document.write( " 3.) what does it mean when a question says , is f (x) a function ?<BR>\n" );
document.write( "4.) what does f(x) means?<BR>\n" );
document.write( "I need your help I'm so confused <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #574550 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=574550\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. Yes. Multiplication of two numbers in [0,1] always returns a number in [0,1].<BR>\n" );
document.write( "2. No. For example, 0.1 - 0.8 = -0.7 which is not in [0,1].<BR>\n" );
document.write( "3. f(x) is a function if and only if each x in the domain is mapped to exactly one value/output in the codomain.<BR>\n" );
document.write( "4. Function notation (read \"f of x\") for a function f that takes argument x<BR>\n" );
document.write( "For 3. and 4., see https://en.wikipedia.org/wiki/Function_(mathematics)) </SPAN>\n" );
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