lim(2-x)^3(3+x)^5/(6-x)^8 x趋近于无穷

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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] 用罗必达法则解 (见图)lim [(e^x)-1/sin(5x)]x->0lim [1-cos(5x)/1-cos(7x)]x->0lim x->0 [(8^x-7^x-1)/(x^2)-1]lim [1-(6/x)]^x x->∞ lim 7cos(3x)sec(9x)x->pi/2 烦人的数学微积分1、lim(x→0)Sin3x/Sin2x2、lim(x→0)x/3*Sin3x3、lim(x→0)[Xsin(3/x)+(tanx/2x)]4、lim(x→3)Sin(x-3)/(X^2-X-6)5、lim(x→∞)[1+(1/2x)^x6、lim(x→∞)(x+3/x)^x7、lim(x→0)(1-x/2)^1/x+118、求下列函数的间断 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→0) (3x^2-5x+2), 求下列各极限?lim x→1[x+3/x的平方-1] lim x→1 [x的平方-求下列各极限?lim x→1[x+3/x的平方-1] lim x→1 [x的平方-1/x的平方-4x+3] lim x→-(π/4) [cos2x/sinx+cosx]lim x→∞ [x的4次方-6x-2/x的5次方-4x的立方+3] lim(2-x)^3(3+x)^5/(6-x)^8 x趋近于无穷 求lim(4x^2-3x)/-5x^2+2x-6 求极限 lim(x->3)(x+1)/(x^2-5x+6) 求极限lim [(2x+6)sin(5/x)]/(4x+3) x+∞ 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 计算极限 lim X2-3X+2 -------------- x→2 X2+5X-6lim X2-3X+2------------x→2 X2+5X-6 几道大学微积分求极限的题1,lim(x→∞){(x-3)^12(2x+1)^8/(3x-1)^20}2,lim(x→+∞){(3x³+5x²+4)/[(√x^6)+2]}3,lim(x→∞)[x+³√(1-x³)]4,lim(x→1){[√(x+3)-2]/√x-1} 谁能帮我解几道极限的题目?1 求f(x)=sin2x+tan(x/2)周期2 lim(x^n-1)/(x-1) (n为正整数)x-1 3 lim(根号(2x+1)-3)/(根号(x-2)-根号2)x-44 lim(根号(x^2+x+1)-根号(x^2-x+1))x-正无穷5 lim{根号[(x+p)(x+q)]-x}x-正无穷6 lim(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 lim(1-5/x)∧(2x+3) lim(x->无穷大){(2^x-3^x)/2}^(1/x) lim(x->0)((2-x)/(3-x))^1/x