document.write( "Question 323636: The sum of the first n odd numbers is 3600. What is the last odd number to be added when the numbers are arranged in natural order? \n" ); document.write( "
Algebra.Com's Answer #231693 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
\"S=%28n%28A1%2BAn%29%2F2%29=3600\"
\n" ); document.write( "\"n%281%2BAn%29=7200\"
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "\"An=A1%2B%28n-1%29%2A2\"
\n" ); document.write( "\"An=1%2B2n-2\"
\n" ); document.write( "\"An=2n-1\"
\n" ); document.write( "Substituting,
\n" ); document.write( "\"n%281%2B2n-1%29=7200\"
\n" ); document.write( "\"2n%5E2=7200\"
\n" ); document.write( "\"n%5E2=3600\"
\n" ); document.write( "\"n=60\"
\n" ); document.write( "\"A%2860%29=2%2860%29-1=119\"\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );