f(x) = (x-1)(x+2)²
syarat nilai stasioner : f'(x) = 0
f'(x) = 1.(x+2)²+(x-1).2.(x+2).1 = 0
(x+2)(x+2 + 2(x-1)) = 0
(x+2)(3x) = 0
x = -2 atau 0
nilai stasioner : f(-2) dan f(0)
f(-2) = (-2-1)(-2+2)² = 0
f(0) = (0-1)(0+2)² = -4
titik stasioner : (-2,0) dan (0,-4)
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f(x) = (x-1)(x+2)²
syarat nilai stasioner : f'(x) = 0
f'(x) = 1.(x+2)²+(x-1).2.(x+2).1 = 0
(x+2)(x+2 + 2(x-1)) = 0
(x+2)(3x) = 0
x = -2 atau 0
nilai stasioner : f(-2) dan f(0)
f(-2) = (-2-1)(-2+2)² = 0
f(0) = (0-1)(0+2)² = -4
titik stasioner : (-2,0) dan (0,-4)