x→2,y→0,求lim sin[(8 -x)y]/xy=多少呀？

x→2,y→0,求lim sin[(8 -x)y]/xy=多少呀？

求极限 lim ln(1+xy)/y x→2，y→0 求lim(√x^2+x+1) (x→0￣) 求lim x→0 ((1+x^2)^(1/3)-1)/(cosx-1) lim(X→0)lncosx/x^2 dy/dx=2y(3-y) lim『x→∞』y 为什么=3 求! lim(x→∞) (x-sinx)/(x+sinx) 求lim x→1 x /(1-x) [高等数学]已知x→-∞时lim[(x^2-x+1)^0.5-(ax+b)]=0,求a,b lim(X→0)[tan2X]/[sin3X] lim(x→0)arcsinx=?