document.write( "Question 1178176: What is the answer in the following?
\n" ); document.write( "•P(n,n-1)=6
\n" ); document.write( "•P(16,4)=208•P(n,2) \n" ); document.write( "

Algebra.Com's Answer #807368 by greenestamps(13200) $\"\"$ $\"About$

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\n" ); document.write( "•P(n,n-1)=6

\n" ); document.write( "P(n,n-1) has the same value as P(n,n), which is n!:

\n" ); document.write( "P(n,n-1) = n(n-1)...(3)(2) = n(n-1)...(3)(2)(1) = n!

\n" ); document.write( "So the first problem is

\n" ); document.write( "n! = 6

\n" ); document.write( "Trivially, the answer is n=3.

\n" ); document.write( "•P(16,4)=208•P(n,2)

\n" ); document.write( " $\"16%2A15%2A14%2A13+=+208%2A%28n%28n-1%29%29\"$
\n" ); document.write( " $\"16%2A15%2A14%2A13+=+16%2A13%28n%28n-1%29%29\"$
\n" ); document.write( " $\"15%2A14+=+n%28n-1%29\"$

\n" ); document.write( "Clearly n=15.

\n" ); document.write( " \n" ); document.write( "

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