Question 687977: im trying to solve this problem showing step by step; nP6=5(nP5)it is alegebra 2
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! n P 6 = n(n-1)(n-2)(n-3)(n-4)(n-5)
n P 5 = n(n-1)(n-2)(n-3)(n-4)
-------------------------------
n P 6 = 5*( n P 5 )
n(n-1)(n-2)(n-3)(n-4)(n-5) = 5 * [ n(n-1)(n-2)(n-3)(n-4) ]
n-5 = 5 ... divide both sides by n(n-1)(n-2)(n-3)(n-4),
this is last step only done if n doesn't equal 0, 1, 2, 3, or 4.
n = 5+5
n = 10
So the answer is n = 10
|
|
|
