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Find the critical numbers of the function. 1. g(y) = (y-1)/(y^2-y+1) 2. h(t) = t^3/4 -...

Find the critical numbers of the function.

1. g(y) = (y-1)/(y^2-y+1)

2. h(t) = t^3/4 - 2t^1/4

3. F(x) = (x^4/5)*(x-4)^2

4. f(x) = 2cos(x)+sin^2(x)

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