问题描述: Find the average rate of change for f(x) = 7x + 12 on [2,8] 1个回答 分类:英语 2014-11-24 问题解答: 我来补答 f(x) = 7x + 12 on [2,8]=[f(8)-f(2)]/(8-2)=(56+12-14-12)/6=7 展开全文阅读