Finding Critical Numbers
For the function $$f(x)= 2*x^3-9*x^2+12*x+5$$, the derivative is $$f'(x)= 6*x^2-18*x+12$$. Solve the equation $$6*x^2-18*x+12=0$$ for x.
A
$$x=1$$
B
$$x=2$$
C
$$x=1,\, 2$$
D
$$x=0,\, 1,\, 2$$
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