document.write( "Question 117274: 7P(n,3) = 6P(n+1,3)
\n" ); document.write( "Not sure why the answer is n=20. \n" ); document.write( "

Algebra.Com's Answer #85298 by Edwin McCravy(20055) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( " = \r\n" );
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document.write( "Not sure why the answer is n=20.\r\n" );
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document.write( "Use the identity  = \r\n" );
document.write( "to rewrite the permutations on both sides:\r\n" );
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document.write( " = \r\n" );
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document.write( " = \r\n" );
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document.write( "Multiply both sides by \r\n" );
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document.write( " = \r\n" );
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document.write( "On the left, write  as \r\n" );
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document.write( " = \r\n" );
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document.write( "Cancel the 's on the left and the\r\n" );
document.write( "'s on the right:\r\n" );
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document.write( " = \r\n" );
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document.write( " = \r\n" );
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document.write( "On the right, write  as \r\n" );
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document.write( " = \r\n" );
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document.write( "Divide both sides by \r\n" );
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document.write( " = \r\n" );
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document.write( " = \r\n" );
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document.write( " = \r\n" );
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document.write( "Edwin

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