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KCC's Quizzes AQQ242 about equation with embedded factorial

I think most of us are now back from their summer vacations! Thus brains are fully recharged!

This following challenge should not be difficult to solve...

  

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  • Answer is n=2, n=3.

    By expanding the factorial on the right side and then dividing everything by n, you can then further divide both sides by (n+1)*(n-1). You get to n= (n-2)*(n-3)*…*1, which is true only for n=2 and n=3. 

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  • Answer is n=2, n=3.

    By expanding the factorial on the right side and then dividing everything by n, you can then further divide both sides by (n+1)*(n-1). You get to n= (n-2)*(n-3)*…*1, which is true only for n=2 and n=3. 

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