document.write( "Question 473539: Dear math teacher, \r
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document.write( "Would you please help me solve this problem? \r
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document.write( "Find n if
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document.write( "3times {(2n+4)Permutation3} = 2times {(n+4)Permutation4}\r
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document.write( "Here is what I got:
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document.write( "3 times (2n+4) times (2n+3) times (2n+2) = 2 times (n+4) times (n+3) times (n+2) times (n+1)\r
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document.write( "But then I am not sure how to isolate n on one side of the equation to solve for it. The correct answer is: 6. \r
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document.write( "Thank you very much for your time and effort in helping me with my homework. \r
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document.write( "I. \n" );
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Algebra.Com's Answer #324774 by ccs2011(207)![]() ![]() You can put this solution on YOUR website! Looks good so far! \n" ); document.write( "To isolate n you need to multiply everything out, then simplify by adding like terms \n" ); document.write( "You should end up with a 4th degree polynomial: \n" ); document.write( " \n" ); document.write( "Now n must be a positive integer because we are dealing with a permutation. \n" ); document.write( "Use synthetic division to try to factor out a factor of 12. \n" ); document.write( "Try 1,2,3,4,6,12 these are the only possible solutions. \n" ); document.write( "If you get a zero remainder then its the solution. \n" ); document.write( " |