Tolong dijawab yah !!

Kelas 11 Matematika
Bab Turunan

02] f(x) = -4x² + 24x -10

Turun

f'(x) < 0
-8x + 24 < 0
-8x < -24
x > -24/-8
x > 3

03] f(x) = x³ - 9x² + 24x - 12

Naik

f'(x) > 0
3x² - 18x + 24 > 0
x² - 6x + 8 > 0
(x - 4) (x - 2) > 0
x - 4 > 0
x > 4

x - 2 < 0
x < 2

Interval
x < 2 atau x > 4