lim x趋向无穷 {（2x^3+x)sin (2/x) }/ x^2+1

lim(x趋向无穷)[1-(2/x)]^3x lim(x趋向于无穷)(1+3/x)^(x-3) lim趋向正无穷(x+1/x)^3x lim趋向正无穷(x+1/x)^3x lim(x趋向无穷)-(x+1)+√(x^2+1) lim(x趋向无穷）(cos1/根号x)^2x lim x趋向无穷 {（2x^3+x)sin (2/x) }/ x^2+1 lim(x趋向无穷）（（3-2x）/（2-2x））^x 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 急求lim(x趋向无穷)(2x-1/2x+3)^x-1 求极限 lim（3- x/2 -x)^x x趋向于无穷 lim(√(x^2+3x)-x) 怎么求X 趋向于 正无穷 lim(x趋向正无穷)((x+1)^4-x^4-(xsinx)^2)/x^3=? lim （x 趋向于无穷)e^-x^2*cosx 【求极限】(x趋向正无穷)lim((x^2)/arctanx). lim(xsinx)/x^2-4,x趋向于无穷 lim xsinx/(x^2-4) x趋向正无穷要用迫敛性证,