lim ( x^3+4x+1)/(x^4+5x+4) x→无限

lim x-1/x平方+3x-4 x-1 lim(x+1)^x+1(x+3)^x+3/x^2x+4 x趋于无穷 lim(x->2) {(3x+16)^1/2-4}/x lim x→∞(2x+1)/(3x-4) 关于极限1.lim((x^-1) + (x^-4))/((x^-2) - (x^-3)) x-> 正无穷2.lim ((e^x) - (e^-x))/((e^x) + (e^-x)) x-> 负无穷 1、lim(x->无穷大) e^x arctanx2、lim(x->0)sinx√1+sin(1/x)3、lim(x->无穷大)【（√x^2+x+1）-【(√x^2-x+1)】4、lim(x->无穷大)((x+{x+(x)^0.5]^0.5}^0.5)/(2x+1)^0.55、lim(x->0)(sin3x+x^2sin1/x)/((1+cosx)x)6、lim(n->无穷大)(2^n)(si lim (x->0) sin(3x)+4x/xsec(x) 求导 lim（x->0) x-sinx/x^3+x^4 lim[x-1%x+1]^[+4] lim x→1 (x^2-4x+3)/(x^4-4x^2+3) lim ( x^3+4x+1)/(x^4+5x+4) x→无限 lim(x→∞)(4x^3+2x-1)/(2x^3-3x+1) lim(x→∞)(x^2+x)/(x^4-3x-1)的极限 求极限,分母为零.lim x to -1 (x^2-4x)/(x^2-3x-4)lim x to 1 (x^3-1)/(x^2-1) 帮忙`````````一些求极限的数学题一.求极限1.lim 3x^+2x+1x→12.lim x^+3x+2/x的三次方+4x^+5x→03.lim x^-1/x-1x→14.lim x^-3x+2/1-x^x→15.lim sin2x/5xx→06.lim sin3x/tan2xx→07.lim (1+x)的x分之2次方x→08.lim （1+2/n)的n次 f(X)是关于X的一个三次多项式.已知lim[f(x)/(x-2)]=lim[f(x)/(x-4)]=1x→2 x→4 求lim[f(x)/(x-3)]=?x→4 数学难题,求指教~~极限到底是什么玩意我还不懂.1.lim（x^2-2x+6）2.lim(x^2-4)/(x-2）3.lim(x^2-6x=8)/(x^-5x=4)4.lim[1/(1-x)-1/(1-x^3)5.lim(sin2x)/x^26.lim(sin5x)/x7.lim(tan3x)/(sin7x)8.lim[(1+x)/x]^2x例如这道例题~lim[(1/3)x+1] lim(x+e^3x)^1/x