题目内容

曲线y=ln x与盲线x+y=1垂直的切线方程为__________．

查看答案

搜索结果不匹配？点我反馈

更多问题

可导函数f(x)，对任意的x，y恒有f(x+y)=f(x)f(y)，且f"(0)=1，则f(x)等于( )

A. x+cosx．
B. shx．
C. ex．
D. 1一e—x．

查看答案

设F(x)=g(x)φ(x)，x=a是φ(x)的跳跃间断点，g"(a)存在，则g(0)=0，g"(a)=0是F(x)在x=a处可导的( )

A. 充分必要条件．
B. 充分非必要条件．
C. 必要非充分条件．
D. 非充分非必要条件．

查看答案

Many aphasics do not show total language loss. Rather, different aspects of language are impaired. Aphasics in ______ area reveal word-finding difficulties and problems with syntax.

A. Werniker’s
B. visual
C. motor
D. Broca’s

查看答案

What can be drawn safely from the case of Genie is that ______.

A. it confirms the critical period hypothesis
B. human’s language acquisition device is independent of other intellectual abilities
C. language can not be acquired at all after the critical period
D. the language faculty of an average human degenerates after the critical period and consequently, most linguistic skills cannot develop

查看答案