lim x->无穷 [(5x^2+1)/(3x-1)]*sin(1/x)+[(x+1)/x^2]*sinx

求极限 （（sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1 x趋向于无穷时 lim (3x-1)/(x^3 乘以 sin(1/x^2 )) lim(3次根号x^2)sinx/1+x^2(x趋于无穷) lim(x趋向无穷)[1-(2/x)]^3x lim(x趋向正无穷)[x]*sin(1\x)=? lim(x+e^2x)^(1/sinx) 求极限 lim(x趋向无穷)[(x+1)^(x+1)/x^x]sin(1/x) 求极限 1,lim(x→∞）（sinx/x +100) 2,lim(x→∞）xtan1/x 3,lim(x→1）sin^ lim(x趋于负无穷)(x^2)sin(1/x)的极限? 求lim x趋向无穷 sin(x+1)/x^2的极限 Lim【sin（1/X）*sinX】 lim(x→0)(1-x^2-e^-x)/sinx