document.write( "Question 174238: n!
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document.write( "2!(n-2)!\r
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document.write( "I understand that 5! is 5*4*3*2*1
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document.write( "I do not understand how to figure n!
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document.write( "I understand that 2! is 2*1 and (n-2)! is (n-2)*(n-1) which would make the problem\r
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document.write( "n!
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document.write( "2*1(n-2)*(n-1)\r
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document.write( "Atleast I think that's what the problem would be, but now what? What do I do with the n! ??? I'm so confused. PLEASE HELP!! Thank you in advance! \n" );
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Algebra.Com's Answer #129170 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! n! \n" ); document.write( "_______ \n" ); document.write( "2!(n-2)!\r \n" ); document.write( "\n" ); document.write( "--------------------\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "= [n(n-1)(n-2)!] / [2!*(n-2)!]\r \n" ); document.write( "\n" ); document.write( "Cancel the (n-2)! that is common to the numerator and the \n" ); document.write( "denominator to get:\r \n" ); document.write( "\n" ); document.write( "= [n(n-1)]/2\r \n" ); document.write( "\n" ); document.write( "================= \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |