document.write( "Question 1205679: the nth term of a sequence is denoted by 3n(2n-1) find the sum of the first 5 terms \n" ); document.write( "

Algebra.Com's Answer #842649 by ikleyn(52832) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "the nth term of a sequence is $\"highlight%28cross%28denoted%29%29\"$ $\"highlight%28cross%28by%29%29\"$ 3n(2n-1).
\n" ); document.write( "Find the sum of the first 5 terms
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "n= 1:   = 3*1*(2*1-1) = 3*1 = 3\r\n" );
document.write( "\r\n" );
document.write( "n= 2:   = 3*2*(2*2-1) = 6*3 = 18\r\n" );
document.write( "\r\n" );
document.write( "n= 3:   = 3*3*(2*3-1) = 9*5 = 45\r\n" );
document.write( "\r\n" );
document.write( "n= 4:   = 3*4*(2*4-1) = 12*7 = 84\r\n" );
document.write( "\r\n" );
document.write( "n= 5:   = 3*5*(2*5-1) = 15*9 = 135\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Thus you just know the first five terms.\r\n" );
document.write( "To find their sum, add these 5 numbers.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "You should get the ANSWER 285.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "--------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "In whole, the task is as simple as a cucumber.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The words in the condition, crossed by red, are excessive and unnecessary.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "They do not make the problem's formulation better.
\n" ); document.write( "In opposite, they make it worst, so I recommend to remove them.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );