document.write( "Question 6221: show that the sum of the first N even natural numbers is equal to (1+1/N) times the sum of the first N odd natural numbers. \n" ); document.write( "
Algebra.Com's Answer #3926 by khwang(438)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( " The first N even natural numbers
\n" ); document.write( " Se= 2+ 4+...+ 2n =2(1+2+3+..+n) = 2* n(n+1)/2 = n(n+1)\r
\n" ); document.write( "\n" ); document.write( " The sum of the first N odd natural numbers
\n" ); document.write( " So= 1+3 +...+ (2n-1) [ arthemic series with common difference 2 ]
\n" ); document.write( " = n(1+2n-1)/2 = n^2.
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\n" ); document.write( " We see that (1+ 1/n)So = (1+ 1/n)n^2 = n^2 + n = n(n+1) =Se\r
\n" ); document.write( "\n" ); document.write( " This completes the proof.\r
\n" ); document.write( "\n" ); document.write( " Kenny\r
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