2√3 x 3√1.5 x 6√12注:3和6是开方

化简：[√(x^2-6x+9)/x^2-x-12]*(x^3-16x)/(x^2-3x)-1/(x+3) {x＞3} xy²/(x²y-y) × x²/(x²+x)=(x²-3x)/(x²-5x) × 2x-10/(x²-6x+9)=化简求植x²-1/(x²-x-2)除以x/2x-4,其中x=1/2[x-x/(x+1)]除以[x/(2x-4)] ,其中x=√2+1 计算:½√8x³-3x√2/x+6x√x/18 lim((√1+x^2)+x)/((√x^3+x)-x)x→+无穷大 2/3x√9x-(x^2√1/x-6x√4/x） (4)2/3X√9x-（x²√1/x-6x√x/4) 已知x*x-3x+1=0求√(x*x+1/x-2)=? 若x=√2,求代数式[(x^2-2x+4)/(√x^2-4x+4)]/[(x^3+8)/(x^2-4)]*[|6-x|/(x^2-5x-6)-[1/(x^2-x+1)]^-1的值 y=(3x^2-x√x+5√x-9)/√x 求导我算到4.5x^0.5-1+2x+4.5x^1.5 , 用公式法解下面几道题.x²-6x+1=0 x²-4x-45=0 4x²-3x-1=x-3 √2 x²= 2√3 x+2√2x²+x-12=0 x²-√2 x-1/4=0 x²+4x+8=2x=11 x(x-4)=2-8x用一根铁丝围成一个8m²的长方 已知x=√2+1,求(x²+x-6)/(3-x)×(2x-6)/(x²-4x+4)÷(x+3)求快速回答啊 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 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｝ 求解sin(x)+lim(x→-∞)+2/x*[x,(x+2)*3]/x+x6+x2/(x+[x,x2+2x])+√x不要用那些太难的解法公式后再加sin(x)+x+[x,x+2+x]-(x,x*3^6)+x! 1.2x+√32＜x+√22.x+√6＞3x+√1.5 (要详细的过程)用公式法解下列方程：(1) x^2+x-12=0 ; (2)x^2-√2（x）-1/4=0 ; (3) x^2+4x+8=2x+11(4) x ( x - 4) = 2 - 8x ; (5) x^2+2x=0 ;(6) x^2+2√5(x)+10=0. 已知x=13/(4+根号3),求(x^4-6x^3-2x^2+18x+23)/(x^2-8x+15) 的值 禁止复制粘贴：x=13/(4+√3)=4-√3√3=4-x3=x²-8x+16x^2-8x+13=0,所以x^2-8x+15=2；x^4-6x^3-2x^2+18x+23=x^2(x^2-8x+13)+2x^3-15x^2+18x+23=2x(x^2-8x+13)+x^2-8x+23=x^2-8x+2 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||