(lim) x/(x-y)

(lim) x/(x-y) (lim) x/x-y= Lim(Sinx-siny/x-y)极限 求极限lim[(sinx-siny)/(x-y)]x趋向y lim(x,y)→(0,0) (1+xcosy)^(1/x) lim(x,y)->(0,2)(1-3xy)^2/x lim sin(y×x^2+y^4)/(x^2+y^2) x,y都趋于0， 1.lim(2x-sinx)/(2x+sinx) (x→0)2.lim(sinsinx)/x (x→0)3.lim 4/y (y→∞) 求极限lim (sinxy) / y x->a y->0 lim[(x,y)->(0,0)][(x^3+x^5)/(x²+y²)极限是 lim(x,y)趋向于(无穷,a) (1+1/x)^(x^2/(x+y))answer:e lim(x→+∞,y→0) (1+1/x)^(x^2/(x+y)) lim(x,y)->(∞,a)(1-1/x)^（x^2/x+y） 证明下列极限不存在 lim(x→0,y→0) （X+Y)/(X-Y) lim(x→0y→1)(1+xe^y)^(2y+x/x)求极限 x.y都趋于正无穷大时：lim（x^2+y^2)e^-(x+y)? lim(x→∞,y→∞) x+y/x^2-xy+y^2 极限x,y趋向0 lim x y/(x^2+y^2) =( ).