lim(x趋向于负无穷)((x^2+1)^1/2+x)怎么做?

lim(x趋向于负无穷)((x^2+1)^1/2+x)怎么做? 求lim x趋向于负无穷 (x/x+1)arctanx“X/(x+1)部分趋向于1” lim(x→-∞)x-2/(x+1)^2求详解!x趋向负无穷! lim(arctan1/x)/(1/x),x趋向于无穷,为什么? lim(x趋向于无穷)(1+3/x)^(x-3) lim （x 趋向于无穷)e^-x^2*cosx lim(xsinx)/x^2-4,x趋向于无穷 x趋向于无穷时 lim (3x-1)/(x^3 乘以 sin(1/x^2 )) lim(x,y)趋向于(无穷,a) (1+1/x)^(x^2/(x+y))answer:e 求lim x趋向于无穷时(-X)/(2X^2+3x-1)答案 lim(x趋向于正无穷) (根号x^2+x -根号x^2+1) lim(((x^2)/(1+x^2))^x）x趋向于无穷求大神详解 lim x趋向于正无穷x(√1+x^2 -x )= lim(e^x)x x趋向于负无穷时 是多少 是0吗? lim(1-2/x)^x/2+1(x趋向于无穷)求极限 求lim（x趋向于无穷）（1-1/x^2)^x的极限 lim(1-2x)∧1/x x趋向于正无穷 lim x趋向于无穷 {1+[2/（1+x）]}^x