document.write( "Question 322086: the value of \"log%287%2C%289%29%29log%285%2C%287%29%29log%283%2C%285%29%29\" is ? \n" ); document.write( "
Algebra.Com's Answer #230603 by Edwin McCravy(20060)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "\"log%287%2C%289%29%29log%285%2C%287%29%29log%283%2C%285%29%29\"\r\n" );
document.write( "\r\n" );
document.write( "Use the change of base formula \"log%28%22OLD_BASE%22%2C%28X%29%29\"\"%22=%22\"\"log%28%22NEW_BASE%22%2C%28X%29%29%2Flog%28%22NEW_BASE%22%2C%28%22OLD_BASE%22%29%29\" \r\n" );
document.write( "\r\n" );
document.write( "for each of those logarithms:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Write \"9\" as \"3%5E2\"\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Use the rule of logarithms: \"log%28B%2C%28Y%5EX%29%29\"\"%22=%22\"\"X%2Alog%28B%2CY%29\" to rewrite the leftmost numerator:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Everything cancels but the 2\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Answer: 2\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" ); document.write( "
\n" );