document.write( "Question 1090249: hi can you help me with this question, thank you :) \r
\n" ); document.write( "\n" ); document.write( "1.)f(x)+2(x-8)^2+5 what is f^-1(7)? \n" ); document.write( "

Algebra.Com's Answer #704696 by MathLover1(20850) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "1.)
\n" ); document.write( " $\"f%28x%29=2%28x-8%29%5E2%2B5\"$ what is $\"f%5E-1%287%29\"$ \r
\n" ); document.write( "\n" ); document.write( "first find $\"f%5E-1%28x%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"f%28x%29=y=2%28x-8%29%5E2%2B5\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y=2%28x-8%29%5E2%2B5\"$ ...........swap $\"x\"$ and $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=2%28y-8%29%5E2%2B5\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x-5=2%28y-8%29%5E2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28x-5%29%2F2=%28y-8%29%5E2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"sqrt%28%28x-5%29%2F2%29=y-8\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"y\"$ =ą $\"sqrt%28%28x-5%29%2F2%29%2B8\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"f%5E-1%28x%29\"$ =ą $\"sqrt%28%28x-5%29%2F2%29%2B8\"$ \r
\n" ); document.write( "\n" ); document.write( "now find $\"f%5E-1%287%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"f%5E-1%287%29\"$ =ą $\"sqrt%28%287-5%29%2F2%29%2B8\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"f%5E-1%287%29\"$ =ą $\"9\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );