$ \lim_{x \rightarrow \infty } x\sin \frac{1}{x} $=_____。
lim_(x arrow infty ) ((1+x)/(x))^2x$\lim_{x \rightarrow \infty } (\frac{1+x}{x})
lim_(x arrow infty ) (2x^3-x+1)$ \lim_{x \rightarrow \infty } (2x^3-x+1) $
lim_(x to infty) x sin (1)/(x) =()单选题（共40题，100.0分） 14. (2.5分) $\lim_{x \to \inft
lim_(x to infty) (sin x)/(x) = 1A. 对B. 错
若 lim_(x arrow a)f(x) 和 lim_(x arrow a)g(x) 都不存在，则 lim_(x arrow a)[f(x)+g(x)] 也不
lim_(x arrow + infty)(x^2+y^2)sin (3)/(x^2)+y^(2)A. 0B. 3C. 1/3D. ∞
lim _(xarrow infty )xsin dfrac (1)(x)= __
极限lim _(xarrow infty )(x)^2(2-xsin dfrac (1)(x)-cos dfrac (1)(x))=A.lim _(xarrow
lim _(x arrow infty)(1-(1)/(3x))^x= ( )A. $e^{-3}$B. $e^{-\frac{1}{3}}$C. $e^{\f
1、如果lim_(xto x_0)f(x)=infty，lim_(xto x_0)g(x)=infty，则必有A. $\lim_{x\to x_0}[f(x)+