判断x趋向于3时,(x+1)/(x^2-9)是无穷大还是无穷小

判断x趋向于3时,(x+1)/(x^2-9)是无穷大还是无穷小 lim(1+3x)^(2/x)x趋向于零 x趋向于无穷时 lim (3x-1)/(x^3 乘以 sin(1/x^2 )) 求lim x趋向于无穷时(-X)/(2X^2+3x-1)答案 limx趋向于无穷时4x^3-2x+8/3x^2+1 2X/(x^3一3) 当X趋向于1时的极限 (x^3+2x-3)/(x^2+5x-6) x趋向于1的极限 求极限,lim(x趋向于1)(x^2-2x+1)/(x^3-x) 1.当X趋向于-1时,X的平方-5X-6除以X平方-3X-42.当X趋向于无穷大,X的平方+2X-2除以X的3次方+3X+3 判断极限是否存在lim [n+(-1)^n]/n n趋向于无穷 lim |x|/x x趋向于0 lim(x趋向于无穷)(1+3/x)^(x-3) lim(1+3x)^3/x x趋向于0 lim(1-2x)^1/x x趋向于0 lim(x趋向于0)(x*cotx-1)/(x^2) x趋向于0,求ln(1+2x)/x 已知x趋向于0时,f(x)是比x高阶的无穷小,且lim ｛ln[1+f(x)/sin2x]｝/(3^x-1)=5 x趋向于0 求limf（x)/x²x趋向于0 ((3x+1)/(3+x))^(1/(x-1)) 当x趋向于1时的极限 x趋向于3时(x^2+3x)/(x-3)^2的极限