lim(x->无穷)((-2)^x+5^x)/((-2)^(x+1)+5^(x+1))

lim(x+5/x-5)^x(x趋向无穷) lim(x/x-c)^x=2 x趋于无穷 lim(x+1/x+2)^x=?x趋于无穷 lim(x趋于无穷)(x/1+x)^(x+2)=? lim（x^2+2x-5）/（x^3+x+5）,x趋于无穷 lim(x->无穷)((-2)^x+5^x)/((-2)^(x+1)+5^(x+1)) Lim(x趋向无穷)[(x^2-6x+8)/(x^2-5x+4)]? lim(2^x+3^x+5^x)^(1/x)x-->正无穷 lim(2^x+3^x+5^x)^(1/x)x-->正无穷 求极限 lim x->无穷 ((2x-1)^30(x-2)^5) / (2x+1)^35 lim 3次√(x^3-5x^2+1)-x X→无穷 lim(2-x)^3(3+x)^5/(6-x)^8 x趋近于无穷 lim(3x-5)/(x^3sin(1/x^2)) 其中x趋于无穷 lim趋于无穷.(x+2/x+3)^2x lim(x趋向无穷)[1-(2/x)]^3x lim(x趋近无穷)(1+2/x)^x怎么求 lim(x趋向无穷)-(x+1)+√(x^2+1) lim x-->正无穷 (x^2 sin1/x) 怎么算?