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Verified answer
f(x)= x^3-9x^2+15x-5f'(x)= 3x^2 -18 x +15
f'(x) > 0
3x^2 -18 x +15 >0 dibagi 3
x^2 - 6x+ 5 >0
(x-5)(x-1) > 0
x >5 atau x<1
jadiin jawaban terbaik ya
f'(x) = 3x^2 - 18x + 15
naik syarat f'(x) > 0
3x^2 - 18x + 15 > 0
(3x - 3)(x - 5) > 0
3x - 3 < 0 atau x - 5 > 0
3x < 3 atau x > 5
x < 3/3
x < 1
Jadi naik pada interval x < 1 atau x > 5 (e)