根据函数极限的定义,证明极限存在的准则I':
如果(1)g(x)≤f(x)≤h(x),(x0,r),
(2),,
那么存在,且等于A.
A) account
B) exhibit
C) demonstrate
D) sense
E) adjust
F) productive
G) suggested
H) implement
I) adopted
J) apply
K) crucial
L) effective
M) efficient
N) exceptional
O) superior
As a boss, I have dealt with all types of employees. The ones that are the least(1)are those who are not adaptive. They may have high IQ points, but they just don't understand how to(2)their theories to reality. I recently read a book by Daniel Goleman, which(3)that the true measure of intelligence was not IQ, but rather EQ or Emotional Intelligence. This made a lot of(4)to me. I have never been at the top of my class, but I have always been(5)and worked well with other people. I have always taken good communication skills my number one priority. I think only testing how well a person solves complicated academic problems fails to take into(6)of other abilities, which can be just as(7)and even more so to a person's accomplishments. In fact, many of the "idea people" have a real hard time getting their point across. They simply don't have the skills to(8)how valuable their idea might be. Sure, the world would be lost without these "idea people", but I'd rather hire someone with(9)EQ. The higher a person's EQ is, the better they will be able to(10)the great ideas they have. The real trick is finding someone who combines both.
求f(t)=(t-τ)·1(t)的拉氏变换。f(t)曲线示于下图,相当于t·1(t)曲线在时间t上延迟一个τ值。
求下列函数的拉氏变换. (1)f(t)=t3-2t+2; (2)f(t)=1-tet; (3)f(t)=(t-1)2et;
(5)f(t)=t sin(at); (6)f(t)=e-2tsin 6t; (7)f(t)=tneat; (8)f(t)=u(1-e-t).
下图电路中,已知R'1=3kΩ,R'2=2kΩ,UZ=6V,试问输出电压UO等于多大?对输入电压UI的大小有何要求?
高等数学复旦大学出版第三版下册课后习题答案习题十三
若r=√x^2+y^2+z^2,计算▽r,▽r^2,▽1/r▽f(r),▽r^n(n≥3)