document.write( "Question 1166899: If f(x) = x³ + 2x find f^(-1)(x) \n" ); document.write( "
Algebra.Com's Answer #791516 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "To find the inverse requires the use of Cardano's cubic formula which is\r\n" );
document.write( "extremely complicated:\r\n" );
document.write( "\r\n" );
document.write( "\"f%28x%29+=+x%5E3%2B2x\", the red curve.\r\n" );
document.write( "\"f%5E%28-1%29\"\"%28x%29\"\"%22%22=%22%22\", the green curve.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );