lim(x→4)x^2-2x-8/x^2-16 求函数极值,

lim(x)lim(x→∞) [(x-1)/(x+1)]^2x 为什么 lim(x->∞) {[(-2)/(x+1)]*2x} = -4 lim (x^3-x^2+4x)/(x^2+x) x→ 0 lim x→∞(2x+1)/(3x-4) lim(x→0)(a^2x-1)/4x 求 lim(x→1)sin(x+1)/x+1 求 lim(x→2)x²-4/x-2 Lim [x^2/(x^2-1)]^x (x→∞) lim(1+x/x)2x (x→∞) lim(x→0)e^x-x-1/x^2 lim x→1 x-1/x^2-x lim(x→0)[e^x-e^(2x)]/x 计算极限lim(lim下面是x→2)x^2-4/x^2-6x+8 lim(x→4)x^2-2x-8/x^2-16 求函数极值, lim(√(4x²-8x+5)+2x+1),x→-∞怎么解? lim xsin(2/x) x→∞ lim(2-x)tanπ/4x lim(1-x)^(2/x) x->0 lim(x(sin)^2) lim(x+1)^x+1(x+3)^x+3/x^2x+4 x趋于无穷