document.write( "Question 852680: the sum to n terms of a sequence of numbers is given as:\r
\n" ); document.write( "\n" ); document.write( "Sn=n/2(5n+9). or Sn=(n/2)(5n+9)\r
\n" ); document.write( "\n" ); document.write( "find the 20th term of this sequence
\n" ); document.write( "

Algebra.Com's Answer #513558 by Kingsley(15)\"\" \"About 
You can put this solution on YOUR website!
Sn=20/2( 5[20] + 9 )
\n" ); document.write( "20/2(100+9)
\n" ); document.write( "20( 50 + 9 )
\n" ); document.write( "ans.=1180
\n" ); document.write( "
\n" );