extreme f(x)=x^{(2)}-5x+4

解答

极值点

f (x) = x^{(2)} - 5 x + 4

极小值 (\frac{5}{2}, - \frac{9}{4})

求解步骤

f^{'} (x) = 2 x - 5

Find intervals:

递减

: - \infty < x < \frac{5}{2},

递增

: \frac{5}{2} < x < \infty

将

x = \frac{5}{2}

代入

x^{2} - 5 x + 4 : - \frac{9}{4}

极小值 (\frac{5}{2}, - \frac{9}{4})

e x t re m e f (y) = - 0.06 x^{2} - 0.02 y^{2} - 1.5 x y - 85 x + 69 y

e x t re m e f (x) = 3 x + 5

e x t re m e p (t) = 500 e^{k t}

e x t re m e f (x) = x y - x^{2} + y^{2} + x + y

e x t re m e 7 x