- #1
six789
- 127
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i just want to confirm if my anser is right...
this is the problem:
solve the expression for n Є N
P(2n + 4, 3) = 2/3P(n+4, 4)
this is my work:
(2n +4)!/(n-3)! = (2/3(n+4)!)/(n-4)!
-2(n-2)!/(n-3)! = -2/3(n-4)!/(n-4)!
-2/(n-3)! = -2/3
-2 = -2/3(n-3)
-2 = -2n/3 +6/3
-2 = -2n/3 +2
-6 = -2n +2
-8 = -2n
n=4
this is the problem:
solve the expression for n Є N
P(2n + 4, 3) = 2/3P(n+4, 4)
this is my work:
(2n +4)!/(n-3)! = (2/3(n+4)!)/(n-4)!
-2(n-2)!/(n-3)! = -2/3(n-4)!/(n-4)!
-2/(n-3)! = -2/3
-2 = -2/3(n-3)
-2 = -2n/3 +6/3
-2 = -2n/3 +2
-6 = -2n +2
-8 = -2n
n=4