document.write( "Question 1150516: $\"sum%28k%5E3%2Ck=4%2C24%29\"$ \n" ); document.write( "

Algebra.Com's Answer #771891 by Edwin McCravy(20060) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "It's true that you can easily add them up directly, especially with the\r\n" );
document.write( "technology available today.  But perhaps this student is not allowed to do it\r\n" );
document.write( "that way.\r\n" );
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document.write( "It is well known that the sum\r\n" );
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document.write( "which is easy to proved by induction.  For n=24\r\n" );
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document.write( "Writing out the first 3 terms of that summation\r\n" );
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document.write( "Summing the first 3 terms:\r\n" );
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document.write( "Subtract 36 from all three sides:\r\n" );
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document.write( "That's with what she got, finding the sum directly instead of with a well-known\r\n" );
document.write( "formula.\r\n" );
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document.write( "Edwin

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