lim x->无穷 [(5x^2+1)/(3x-1)]*sin(1/x)+[(x+1)/x^2]*sinx

lim(x+1/x+2)^x=?x趋于无穷 lim(x趋于无穷)(x/1+x)^(x+2)=? lim(x->无穷)((-2)^x+5^x)/((-2)^(x+1)+5^(x+1)) 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 lim(x趋向无穷)-(x+1)+√(x^2+1) lim x-无穷 (√3x^2+1)/x+1 lim(1-(1/x))^(x-2) x趋近于无穷 lim(x趋向无穷)[1-(2/x)]^3x lim(x趋近无穷)(1+2/x)^x怎么求 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(3x-5)/(x^3sin(1/x^2)) 其中x趋于无穷 (1) lim(x->正无穷) x-lnx (2) lim(x->0+) cosx^1/x^2 lim[e^(2/x)-1]*x趋近于正无穷 lim(x~无穷)xsin1/x-1/xsinx lim~~~数学题lim（x趋近无穷）x+2+lnx/（x-1）=? lim(x+1)^x+1(x+3)^x+3/x^2x+4 x趋于无穷