document.write( "Question 607406: 75+15+3+...
\n" ); document.write( "Find the sum, if it exists.
\n" ); document.write( "Help? how to solve? \n" ); document.write( "

Algebra.Com's Answer #382680 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!
75+15+3+...
\n" ); document.write( "

\r\n" );
document.write( "To show that this is a geometric series, and to find r,  \r\n" );
document.write( "we divide the 2nd term by the 1st term.  Then we divide \r\n" );
document.write( "the 3rd term by the 2nd term, and if those two numbers\r\n" );
document.write( "are the same then it is a geometric series and r = what\r\n" );
document.write( "we got when we divided those.\r\n" );
document.write( "\r\n" );
document.write( "15÷75 =  = \r\n" );
document.write( "\r\n" );
document.write( "3÷15 =  = \r\n" );
document.write( "\r\n" );
document.write( "They are the same so it is a geometric series with r = .\r\n" );
document.write( "\r\n" );
document.write( "It is an infinite series with sum given by the formula\r\n" );
document.write( "\r\n" );
document.write( " =  =  =  = ÷ = × =  = 93.75\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "

\n" );