take the derivative of each one and set it equal to zero and solve.
BTW, what is the rt in the first equation?
your function is f(x) so it is dependent on x.
Find the critical numbers of each given function.
(a) f(x)=3rt(x^(2)-x
(b) g(x)=2sinx+2cos^(2)x, 0 <=x<=2pie
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