问题描述：
一道AP微积分题目
If f is differentiable and difference quotients overestimate the slope of f at x=a for all h>0, which must be true?
Answer: f''(a)>0 为什么= =
我知道了……但是回答仍然给分！
If f is differentiable and difference quotients overestimate the slope of f at x=a for all h>0, which must be true?
Answer: f''(a)>0 为什么= =
我知道了……但是回答仍然给分！
问题解答：
我来补答展开全文阅读