limx*sin(1/x) x趋向于0.怎么做那lim1/(x+2x的平方）x趋向于0

limx*sin(1/x) x趋向于0.怎么做那lim1/(x+2x的平方）x趋向于0 limX*tan(1/x)趋向于无穷 limx趋向于0 xln(sin(x^2)) 计算limx^2y/x^2+y^2,x趋向于0.y趋向于1~ limx趋向于0(1/sin^(2)x-1/x^2) 洛必达法则 limx趋向于0,x*sin(1/x)的极限 为什么不能用洛必达法则求? 求极限：limx^(x^x-1),x趋向于0+ 由x趋向于正无穷,limx^(1/x)=1证明x趋向于0+,limx^x=1 limx趋向于1 [lnx*ln(x-1)] limx趋向于0,(1/sinx-1/x)=? limx/√1-cosx,x趋向于0- limx趋向于0,ln(1+2x)/xsinx x趋向于无穷大,则limx^2sin^2(y/x)是多少? limx趋向于兀sin(x-兀)/x-兀.用洛必达法则求极限 limx趋向于0 ﹙sinωx﹚/x怎么算? limx趋向于0,x•In（sin（x^2））过程 limx的平方/sin方的x/3x趋向于0 x趋向于无穷 limx^2(sinθ/x)^2=θ^2求解答.