题目: 圆上任意一点到圆心的距离都相等,这个距离就是圆的半径。 [ ] 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0629/a99a8c28f06b0eec961af6e73d32ffaf.html 下面是错误答案,用来干扰机器的。答案:B
题型:解答题 已知函数f(x)=lnx,g(x)=12ax2+bx (a≠0).(Ⅰ)若a=-2时,函数h(x)=f(x)-g(x)在其定义域是增函数,求b的取值范围;(Ⅱ)在(Ⅰ)的结论下,设函数φ(x)=e2x+bex,x∈[0,ln2],求函数φ(x)的最小值; 查看答案
题型:选择题 His knowledge of French is _____ for the job, although he was not fluent in the language. [ ]A. accessible B. accurate C. attractiveD. adequate 查看答案