题目内容

求曲线x2+3xy+y2+1=0在点M0(2，-1)处的切线方程与法线方程．

查看答案

搜索结果不匹配？点我反馈

更多问题

若有定义语句：int a=3,b=2;，则表达式a＜ba:b的值是______。

Did the girl see the film during school hours

A. Yes,but she came too early.
B. Yes, but she came too late to meet any people.
C. No, she lost her way so she want back home.

查看答案

1 Landscape architects design landscapes in residential areas, public parks, and commercial zones. They are hired by many types of organizations, from real estate firms starting new developments to municipalities constructing airports or parks. They usually plan the arrangement of vegetation, walkways, and other natural features of open spaces. 2 In planning a site, landscape architects first consider the nature and purpose of the project, the funds available, and the proposed elements. Next, they study the site and map such features as the slope of the land, the positions of existing buildings, existing utilities, roads, fences, walkways, and trees. Then, working either as the leader of a design team or in consultation with the project architect or engineer, they draw up plans to develop the site. If the plans are approved, they prepare working drawings to show all existing and proposed features. They outline the methods of constructing features and draw up lists of building materials. 3 Newcomers to the field usually start as junior drafters, tracing drawings and doing other simple drafting work for architectural, landscape architectural, or engineering firms. After two or three years, they can carry a design through all stages of development. Highly qualified landscape architects may become associates in private firms, but usually those who progress this far open their own offices. All of the following are listed as stages in the landscape design process EXCEPT

A. thinking about the project’s purpose and the funding
B. building a fence around the construction site
C. making drawings that include old and new features
D. preparing lists of building materials and methods

查看答案

设f(x)x4-4x+1，试讨论方程f(x)=0有几个根．

查看答案