1. If the second derivative f "(x) >; 0, then f'(x) is increasing function, and f(x) is drawn as convex (or concave), such as f(x)=x? ,f'(x)=2x,f ' '(x)= 2 & gt; 0,
So f(x)=x? Is a lower convex function.
2. Similarly, if the second derivative f "(x)
Note: convexity and convexity have nothing to do with the increase or decrease of the original function, and the boundary point between convexity and convexity is the inflection point of the function.
For example, f(x)=x? ,f'(x)=3x? , f''(x)=6x, let f''(x)=0, x=0,
When x>0 and f''(x)>0, f(x) is convex; When x
F(x) is increasing in R, which shows that convexity and convexity have nothing to do with the increase or decrease of the original function.
A. What are the majors of Zhejiang Gongshang University?
Zhejiang Gongshang University was upgraded to touris