document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=930211>Question 930211</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+find+f%5E-1++ ALIGN=MIDDLE  ALT=\"+find+f%5E-1++\"   DISABLED_style= \"max-width:90%; height:auto;\" >   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%28x%29=%28x%2B2%29%5E2++ ALIGN=MIDDLE  ALT=\"+f%28x%29=%28x%2B2%29%5E2++\"   DISABLED_style= \"max-width:90%; height:auto;\" >  x is greater than or equal to -2\r<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 #564764 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=564764\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Please help me solve this: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+find+f%5E-1++ ALIGN=MIDDLE  ALT=\"+find+f%5E-1++\"   DISABLED_style= \"max-width:90%; height:auto;\" >   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%28x%29=%28x%2B2%29%5E2++ ALIGN=MIDDLE  ALT=\"+f%28x%29=%28x%2B2%29%5E2++\"   DISABLED_style= \"max-width:90%; height:auto;\" >  x is greater than or equal to -2<BR>\n" );
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document.write( "Note: y = (x+2)^2 is a parabola opening upward from vertex = (-2,0)<BR>\n" );
document.write( "That function does not have an inverse as each x-value would have <BR>\n" );
document.write( "2 corresponding y-values.<BR>\n" );
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document.write( "But, if x >= -2, the function DOES have an inverse.<BR>\n" );
document.write( "1st: Interchange x and y to get:<BR>\n" );
document.write( "x = (y+2)^2<BR>\n" );
document.write( "2nd: Solve for \"y\"::<BR>\n" );
document.write( "y+2 = sqrt(x)<BR>\n" );
document.write( "f^=1 = sqrt(x)-2 and y >= -2<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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