Diketahui fungsi f(x)=x^3-9x^2+15x+10. Tentukan titik stasioner dan jenisnya

turunan = 0
3x² - 18x + 15 = 0
------------------------- ÷3
x² - 6x + 5 = 0
(x - 5)(x - 1) = 0
+ + + _ _ _ + + +
-------•-------•--------
`````````1 ````````5
x = 1
y = (1)³ - 9(1)² + 15(1) + 10
= 1 - 9 + 15 + 10
= 17
(1,17) titik maksimum
x = 5
y = (5)³ - 9(5)² + 15(5) + 10
= 125 - 225 + 75 + 10
= - 15
(5,-15)titik minimum