document.write( "Question 501518: What is the ratio of the nineteenth term to the twentieth term?????? 1,-3,9,-27,... \n" ); document.write( "

Algebra.Com's Answer #338549 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
A general formula for this would be
\n" ); document.write( " $\"+%28-1%29%5En+%2A+3%5En+\"$ where $\"n\"$ varies from
\n" ); document.write( " $\"0\"$ to any positive integer
\n" ); document.write( "------------
\n" ); document.write( "The ratio of the nineteenth term to the twentieth term:
\n" ); document.write( " $\"+%28%28-1%29%5E18%2A3%5E18%29+%2F+%28%28-1%29%5E19%2A3%5E19%29+=+1+%2F+%28%28+-1%29%2A3%29+\"$
\n" ); document.write( " $\"++1+%2F+%28%28+-1%29%2A3%29+=+-%281%2F3%29+\"$
\n" ); document.write( "---------------------
\n" ); document.write( "Note that I start counting terms with $\"0\"$ , so the
\n" ); document.write( "the 19th term has $\"+n+=+18+\"$
\n" ); document.write( "the 20th term has $\"+n+=+19+\"$ \n" ); document.write( "

\n" );