document.write( "Question 1141509: Please help me solve this:\r
\n" ); document.write( "\n" ); document.write( "Find the fifth term in the expansion of (ab-1) ^20. Use the term formula. \n" ); document.write( "
Algebra.Com's Answer #762077 by MathTherapy(10552)\"\" \"About 
You can put this solution on YOUR website!
Please help me solve this:\r
\n" ); document.write( "\n" ); document.write( "Find the fifth term in the expansion of (ab-1) ^20. Use the term formula.
\n" ); document.write( "
BINOMIAL EXPANSION term formula: , where r = term number, or 5, and n = 20.
\n" );
document.write( "We then get: 5th term of 
\n" );
document.write( "             5th term of 
\n" );
document.write( "             5th term of \"matrix%281%2C3%2C+%28ab++-++1%29%5E20%2C+%22=%22%2C+%224%2C845%22%28ab%29%5E16%281%29%29\"
\n" );
document.write( "             5th term of  \n" );
document.write( "
\n" );