Jawabanmu

2014-09-10T17:13:33+07:00
Luas = integral  (4x-x²) = 2 x² - 1/3 . x³  dengan range = x=1 sampe x-4

[2 . 4² -1/3 . 4³] - [ 2 . 1² -1/3 . 1²] = [32 - 16 -2 -1/3]=13 2/3