limx->1 (x^3+ax^2+x+b)/(x^2-1)=3求a b的值.

已知limx^2+ax+b/x-1=3(x趋向于1),求a, limx→+∞[3x-根号下（ax^2-x+1]=2,求a limx->1 (x^3+ax^2+x+b)/(x^2-1)=3求a b的值. limx趋于1 2/3x^3 limx-0(1-3根号1-x+x^2)/x 若limx~∞[ax^3+(b-1)x^2+2/x^2+1]=1,求a,b的值 若limx→3(x^2+ax+b)/(x-3)=1,求a,b的值 若limx→∞[(2x^2+3)/(x+1)-ax+b]=0,求a,b的值 若极限limx→∞【4x^2+3/x-1+ax+b】=0.求常数a b.求极限limx→∞(√若极限limx→∞【4x^2+3/x-1+ax+b】=0.求常数a b.求极限limx→∞(√n^2+n)-n limx趋向无穷[(x^2+1)/(x+1)]-(ax+b)=1 求a,b limx->2[x^3+ax+b/x-2]=8求ab值 1.limx→∞(1-1/2x)^x 2.limx→∞(1﹢x／x)^2x 3.limx→∞(1+1/x+3)^x 4.limx→0(1+2x)^1/x limx趋近无穷,3ax/(x-a) 算出来是什么 1.设f(x)是三次函数,且limx→-1 f(x)/(x+1)=6,limx→-2 f(x)/(x-2)= -3/2,求limx→3 f(x)/(x-3)的值.2.已知limx→1 (ax^2+bx+1)/(x-1)=3,求limx→∞ ( b^n+a^(n-1) )/( a^n+b^(n-1) )需要全过程, limx→∞(1+1/2x)^3x+2 limx→3 e^1/(x-3)(x-2） limx趋向无穷大,(1+1/x)^3x+2=? limx趋向1 2x+3/x-1 求极限