lim 3x^2-3x+2／x^2-4 求极限x→∞

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^3-x^2+4x)/(x^2+x) x→ 0 lim(x->无穷大){(2^x-3^x)/2}^(1/x) lim(x->0)((2-x)/(3-x))^1/x ( x+3) lim (------------)的x次方 x->∞ ( x-2) 1.lim x->∞ （2x/x^2+1)*cosx 2..lim x->∞{ [(x^2-x)arctanx]/x^3-x-5}3..lim x->0 （e^x-e^-x-2x)/(x-sinx) 4..lim x->0 (sinx-x)/(x^3) 5..lim x->0 (x^2*tanx)/(x-tanx) 6..lim x->0 (1+3/x)^2x 7..lim x->0 (1+2x)^(3/sinx) 8.lim x->∞ (x/1+x)^(x-3) 9..li lim x→1 (x^2-4x+3)/(x^4-4x^2+3) 求极限lim(x→2)(x^2-3x+2)/(x^2+4x-12) lim(x→∞)(4x^3+2x-1)/(2x^3-3x+1) lim(x→∞)(7x^3+4x)/(2x^3-x^2+3)=? lim (3x^2+4x+6)/(x^2+x) x→无限 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