Jawabanmu

2014-06-24T22:26:28+07:00
Setiap unit barang = x
x (x² - 18x +96)
x³ - 18x² + 96x

p'(x) = 0
3x² - 36x + 96 = 0
x² - 12x + 32 = 0
(x - 8) (x - 4)

x=8 --> 8³ - 18(8)² + 96.8 = 512 - 1152 + 768 = 128
x=4 --> 4³ - 18(4)² + 96.4 = 64 - 288 +384 = 160
pendapatan max. 160