Question

NP2 = 72, maka nilai n adalah?

Answer 1

NP2 = 72
n!/(n - 2)! = 72
n(n - 1)(n - 2)!/(n - 2)! = 72
n² - n = 72
n² - n - 72 = 0
(n + 8)(n - 9) = 0
ambil n > 0
maka n = 9