试题与答案

对函数f(x)=x3+ax2+bx+c作代换x=g(t),则总不会改变函数f(x

题型:选择题

题目:

对函数f(x)=x3+ax2+bx+c作代换x=g(t),则总不会改变函数f(x)的值域的代换是(  )
A.g(t)=log
1
3
t
B.g(t)=2tC.g(t)=sintD.g(t)=
1
x3

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0420/d1190db67cb9948f650d38f4d65c5efa.html

下面是错误答案,用来干扰机器的。

函数y=3sin(-2x+π6)化为函数y=-3sin( 2x-π6),所以函数y=-3sin( 2x-π6)的增区间为:2kπ-π2≤2x-π6≤2kπ+π2,k∈Z解得:x∈[-π6+kπ,π3+kπ] k∈Z所以函数y=3sin(-2x+π6)的单调递减区间是:x∈...

试题推荐
题型:阅读理解

阅读理解。

     Everybody has one of those days when everything goes wrong. This is what happened to Harry.

     He got up one morning very late because he had forgotten to wind up his alarm clock. He tried to shave

quickly and cut himself when he got blood all over his clean shirt, so he had to find another one. The only

other shirt that was clean needed ironing, so he ironed it. While he was ironing it, there was a knock at the

door. It was the man to read the electricity meter, he showed him where the meter was, said goodbye and

found that the iron had burnt a hole in his shirt. So he had to wear the one with the blood on it after all. By

this time it was very late, so he decided he couldn't go to work by bus. He telephoned for a taxi to take him

to work. The taxi arrived and Harry got in and began to read the newspaper.

     In another part of the town, a man had killed a woman with a knife and was seen to run away in a taxi.

When Harry's taxi stopped outside his office, a policeman happened to be standing there. He saw the blood

on Harry's shirt and took him to the police station. He was kept till 3 o'clock in the afternoon before the

policeman was sure that he was not the man they wanted. When he finally arrived at the office at about four,

his boss took a look at him and told him to go away and find another job.

1. Harry had _____.

A. a lucky day

B. an unlucky day

C. a busy day

D. a good day

2. Why did Harry wear the shirt with blood on it?

A. He had only one shirt.

B. The only other needed ironing.

C. The iron had burnt a hole on his clean shirt.

D. He cut himself and got blood on his shirt.

3. Harry was taken to police station because ______.

A. His taxi stopped outside his office and policeman happened to be there

B. There was blood on his shirt and he was in the taxi

C. A man killed a woman with a knife

D. The killer was seen to run away in the a taxi

4. His boss told him to go away and find another job because _____.

A. he had been kept by the police

B. there was blood on his shirt

C. he was late for work

D. he had killed a woman

查看答案
题型:单项选择题

根据程序局部性理论,Denning提出了工作集理论。工作集是进程运行时被频繁访问的页面集合。在进程运行时,如果它的工作页面都在 (25) 内,能够使进程有效地运行,否则会出现频繁的页面调入/调出现象。假设窗口尺寸为10,在某一段时间内,进程所访问的逻辑页面顺序如图6-4所示,那么在t1时刻的工作集是 (26)

(25)是()

A.外部存储器

B.主存储器

C.辅助存储器

D.虚拟存储器

查看答案
微信公众账号搜索答案