(n-1)P2 = 6
(n-1)!/((n - 1) - 2)! = 6
(n-1)!/(n-3)! = 6
(n - 1)(n - 2)(n - 3)!/(n - 3)! = =
(n - 1)(n - 2) = 6
n² - 3n + 2 = 6
n² - 3n - 4 = 0
(n - 4)(n + 1) = 0
Maka,karena n bilangan asli,
maka n = 4
n ≠ -1
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(n-1)P2 = 6
(n-1)!/((n - 1) - 2)! = 6
(n-1)!/(n-3)! = 6
(n - 1)(n - 2)(n - 3)!/(n - 3)! = =
(n - 1)(n - 2) = 6
n² - 3n + 2 = 6
n² - 3n - 4 = 0
(n - 4)(n + 1) = 0
Maka,karena n bilangan asli,
maka n = 4
n ≠ -1