x→无穷大lim((x-4)/(x+2))^x+1 求极限

x→无穷大lim((x-4)/(x+2))^x+1 求极限 lim(x→无穷大)xsin1/x=? lim(x->无穷大)x/(sinx)^2=? lim (1+2/x)^2 x→无穷大 lim((√1+x^2)+x)/((√x^3+x)-x)x→+无穷大 1、lim(x->无穷大) e^x arctanx2、lim(x->0)sinx√1+sin(1/x)3、lim(x->无穷大)【（√x^2+x+1）-【(√x^2-x+1)】4、lim(x->无穷大)((x+{x+(x)^0.5]^0.5}^0.5)/(2x+1)^0.55、lim(x->0)(sin3x+x^2sin1/x)/((1+cosx)x)6、lim(n->无穷大)(2^n)(si lim(x+t/x-t)∧x x→无穷大 lim(x->无穷大){(2^x-3^x)/2}^(1/x) lim x->正无穷大 x ( sqrt(x^2+1)-x ) 求lim x→无穷大 (1-3/x)^x lim(x趋向无穷大)[1+2/(x+2)]^(x+2) lim x趋向无穷大 (1+2/x)^x=? lim（x/（1+x^2））,x趋向无穷大 求 lim（x->无穷大） LIM [1+a/(X^2+X)]^(X^2) (X→无穷大) Lim(x→无穷大）√（x^2+3x)-x lim (x^2+1)/(x^4-9x+6) x趋于无穷大 极限为0?、 极限lim X→无穷大Xtan1/X 等于什么?