extreme f(x)=x^2-4x-4

解答

极值点

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

极小值 (2, - 8)

求解步骤

f^{'} (x) = 2 x - 4

Find intervals:

递减

: - \infty < x < 2,

递增

: 2 < x < \infty

将

x = 2

代入

x^{2} - 4 x - 4 : - 8

极小值 (2, - 8)

e x t re m e f (x, y) = 10 - \frac{x ^{2}}{2} - \frac{y ^{2}}{2}

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

e x t re m e f (x, y) = 6 y^{3} - 5 x^{3} y + 3 x^{2}

e x t re m e f (x) = (x - 1)^{2} \cdot (x - 3) + 2

e x t re m e f (x) = 14 x + 19 x^{\frac{14}{19}}