Titik Stasioner dari fungsi f(x) = x(pangkat3) - 12x(pangkat2) + 12...?
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turunan kedua = 0
f '(x) = 3x² - 24x
f ''(x) = 6x - 24 = 0
diperoleh x = 4
x = 4 >> y = (4)³ - 12(4)² + 12 = 64- 192 + 12 = -116