3.计算下列极限(1) lim_(x→2)(-2) ;(2) lim_(x→1)(x^3-x^2+x-1) ;21(3)lim_(x→2)(x^2-16)/(x-4) (4)lim_(x→3)(x^2-9)/(x-3) (5)lim_(x→1)(1/(1-x)-3/(1-x^3)) (6)lim_(x→0)((x+h)^3-x^3)/h (7)lim_(x→1)(√(x+3)-2)/(x-1) (8) lim_(x→+∞)√x(√(x+2)-√(x+1))x+o(9)超清说lim_(n→∞)(9x^4+3x^2-10)/(3x^4+x^3-x^2+1) (10)lim_(x→∞)(x^3-2x^2+5)/(100x^2+15)

3.计算下列极限(1) lim_(x→2)(-2) ;(2) lim_(x→1)(x^3-x^2+x-1) ;21(3)lim_(x→2)(x^2-16)/(x

3.计算下列极限.-|||-(1) lim _(xarrow 2)(-2) ;-|||-(3) lim _(xarrow 2)dfrac ({x)^2-16}(

lim_(x arrow ∞) (x^2+x)/(x^4-3x^2+1)$\lim_{x \rightarrow ∞} \frac{x^2+x}{x^4-3x^

设lim_(x to 0) (sin 2x + xf(x))/(x^3) = 1，则lim_(x to 0) (2cos x + f(x))/(x^2) = (

(3)求极限lim_(xto0)((2^x+3^x)/(2))^(1)/(x).(3)求极限$\lim_{x\to0}\left(\frac{2^{x}+3^{

求极限 lim_(x to infty) ( (2x+3)/(2x+1) )^x-1 求极限 $\lim_{x \to \infty} \left( \frac

若 lim_(x to 0) (f(2x))/(x) = 2，则 lim_(x to infty) xf((1)/(2x)) = ( )A. $\frac{1}

8.设lim_(x to 0) (sin 2x + xf(x))/(x^3) = 1,则lim_(x to 0) (2cos x + f(x))/(x^2) =

求下列各极限:(1) lim_((x,y)to(0,1))(1-xy)/(x^2)+y^(2);(3) lim_((x,y)to(0,0))(2-sqrt(xy

lim_(x arrow infty ) (2x^3-x+1)$ \lim_{x \rightarrow \infty } (2x^3-x+1) $