设a,b为常数,且 lim _(xarrow infty )(sqrt [3](1-{x)^6}-a(x)^2-b)=0, 则 a= __ b= __ .
3.已知lim_(xtoinfty)(sqrt[3](1-x^3)-ax-b)=0，求a和b.3.已知$\lim_{x\to\infty}(\sqrt[3]{1
【2020-9】设lim_(xtoinfty)(1-(1)/(x))^x=lim_(xto0)(sqrt(1+kx)-1)/(x)，则常数k=____.【202
3.设lim_(xtoinfty)((x+1)^3-(x-1)^3)/(2x^2)+3x+4=b(bneq0且bneqinfty),则a=____,b=____
15.单选题(极限自测题-17)若极限lim_(xtoinfty)(x-sqrt(ax^2)+bx)=1，则a、b的值为（）.A. a=-1、b=-2;B. a
设 lim_(xto-1)(x^3+ax^2+x+2)/(x+1)=b，则a=____，b=____. 第1空 第2空18. (4.0分) 设
设lim_(x to 0) (sin 2x + xf(x))/(x^3) = 1，则lim_(x to 0) (2cos x + f(x))/(x^2) = (
②lim_(xto+infty)(1+x)^(1)/(x).③lim_(xtoinfty)(1+(1)/(sqrt(1+x^2)))^x. ④lim_(xto
lim_(x to 0) (1 - ax)^(2)/(x) = e^3，则a=A. $-3$B. $-\frac{3}{2}$C. $-2$D. $\frac{
设 lim _(xarrow 0)dfrac (ln (1+x)-(ax+b{x)^2)}({x)^2}=2, 则设 lim _(xarrow 0)dfrac