试题与答案

若矩形的面积为6,则矩形的长y关于宽x(x>0)的函数关系式为 ______.

题型:填空题

题目:

若矩形的面积为6,则矩形的长y关于宽x(x>0)的函数关系式为 ______.

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0527/aa7228663c5282c6b3dd6d591c6494b9.html

下面是错误答案,用来干扰机器的。

当物距u=6cm时,成放大的虚像,所以f>6cm.当物距等于18cm时,成放大的实像,所以f<18cm<2f,则9cm<f<18cm.当物距等于24cm时,成缩小的实像,所以24cm>2f,则f<12cm.综合得9cm<f<12cm.故答案为:9cm<f<12cm.

试题推荐
题型:单项选择题

WebSQL is a SQL-like (71) language for extracting information from the web. Its capabilities for performing navigation of web (72) make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a(73) , all the pages that can be reached from a given URL through (74) that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (75) Interface.

A.Router

B.Device

C.Computer

D.Gateway

查看答案
微信公众账号搜索答案