4.(2015•内江)一Thefishtastes;wehaveeatenitup.—Itiscertainthatshecookedit.A.good;wellB.well;goodC.well;wellD.good;good
4. (2015 •内江)
一 The fish tastes ; we have eaten it up.
— It is certain that she cooked it .
A. good; well B. well; good
C. well;well D. good;good
已知函数f(x)=x^2-2x-3,若x∈[t,t+2]时,求f(x)的最值.我理解当t+2≤1时 2020-05-13 …
二元函数积分的应用题一个气球的体积被定义为V=(e^-h)/(1+t^2),h(t)>0表示在t时 2020-06-03 …
∮1dx/(x^2+y^2+z^2)ds,其中,曲线x=(e^t)sinty==(e^t)cost 2020-06-03 …
设奇函数f(x)在[-1,1]上是增函数,且f(-1)=-1,当a∈[-1,1]时,f(x)≤t2 2020-06-08 …
定积分Asin^2(t/T)dt是多少原题是从0-T,定积分Asin^2(t/T)dt=1求A的值 2020-06-10 …
设f(x)在(-∞,+∞)内可导,且F(x)=f(x^2-1)+f(1-x^2),证明F'(1)= 2020-06-15 …
这个微分方程怎么解!r(t)^2+3r(t)^1+2r(t)=e(t)^2+2e(t)^1+e(t 2020-07-23 …
变上限积分求导f(x)=∫(0,x)(x-t)^2*f(t)dt如何对x求导?原题:函数f(x)满 2020-07-31 …
关于参数方程的问题1.x=e^t+e^(-t)y=2(e^t-e^(-t))e=2.71828(t 2020-08-02 …
参数方程问题(1)X=T^2+1/T^2Y=T^2-1/T^2(2)X=2/T+1Y=T-2/T+ 2020-08-02 …