求lim x趋向于0(arctanx)/(x^2+1)

求lim x趋向于0(arctanx)/(x^+1) 求lim x趋向于0(arctanx)/(x^2+1) 当x趋向于0+,lim arctanx/lnx=? 求lim(arcsinx·arctanx)/2x2的极限,x趋向于0 求lim x趋向于负无穷 (x/x+1)arctanx“X/(x+1)部分趋向于1” lim x趋向于无穷 （arctanx）/x lim(arctanx/2x) x趋向于零 求极限lim(2/π arctanx)^x 其中x趋向于正无穷大 求极限lim(2/π arctanx)^x 其中x趋向于正无穷大 当X趋向于0时 证明lim arctanX/X=1 【求极限】(x趋向正无穷)lim((x^2)/arctanx). 用无穷小量的性质求下列极限,1,x趋向于0,limx^2cos(1/x) 2,x趋向于无穷大,lim(arctanx/x) 3,x趋向于0 lim(x趋向0)(arctanx-x)/sinx^3 lim(x趋向0)arctanx-sinx/x^3 求lim x趋向于0(e^x-x-1) lim(x趋向于0+）x^tanx 求极限? 求lim x趋向于0(x-sinx)/tanx^3 求lim x趋向于0（sin2x)/x?