document.write( "Question 607190: Find the 15th term of the given sequence -9, 27 , -81..... \n" ); document.write( "
Algebra.Com's Answer #382512 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "first, identify the first term in the sequence, call this number a.\r
\n" ); document.write( "\n" ); document.write( "you have \"a=-9\"\r
\n" ); document.write( "\n" ); document.write( "second, calculate the common ratio \"r\" of the sequence\r
\n" ); document.write( "\n" ); document.write( "in your case the common ratio \"r\" is \"-3\"\r
\n" ); document.write( "\n" ); document.write( "if you multiply first term \"-9\" by common ratio \"-3\" you get second term \"27\"\r
\n" ); document.write( "\n" ); document.write( "third, you need \"n\", the term you need to find
\n" ); document.write( "in your case \"n=15\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "forth, insert these values into the equation:\r
\n" ); document.write( "\n" ); document.write( "\"ar%5E%28n-1%29\" and calculate the \"15th\" term\r
\n" ); document.write( "\n" ); document.write( "\"-9%28-3%29%5E%2815-1%29=-9%2A%28-3%29%5E14=-9%2A4782969=-43046721\"\r
\n" ); document.write( "\n" ); document.write( "so, your sequence is:
\n" ); document.write( "-9, 27 , -81, 243, -729, 2187,-6561, 19683, -59049, 177147,-531441,1594323,-4782969, 14348907, \"-43046721\"\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );