Factorial N

If Factorial( N ) * Factorial( N +2 ) = Factorial( 2N ), How to find Solution Set of N in the simplest way..Note: (nPr ans nCr may be included in the solution.)

Please I want a solution simple as much as possible as it's for a high school student.

Thanks in advance.

Quote:

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Originally Posted by islamdiaa

If Factorial( N ) * Factorial( N +2 ) = Factorial( 2N ), How to find Solution Set of N in the simplest way..Note: (nPr ans nCr may be included in the solution.)

Please I want a solution simple as much as possible as it's for a high school student.

Thanks in advance.

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N = 3 is an obvious solution.