lim x—>-2 (1/(x+2) - 12/(x^3 +8) ) 求极限~

lim x—>-2 (1/(x+2) - 12/(x^3 +8) ) 求极限~ 求极限lim(1-2/x+3/x^2)^x lim(x->∞)[x^7(1-2x)^8/(3x+2)^15]求极限 求极限lim(1+2/x)^2x+3 求lim(x→0)x cos 1/x lim(x→∞)x^2/ (3x-1)的极限 求极限lim(x-->0)x^2 sin(1/x), 求极限lim{xln(1+2/x)} 求极限lim(x→2)(x^2-3x+2)/(x^2+4x-12) 求极限lim x—>无穷[ (x+1)^3]/[(x-1)^2]/x 这个极限怎么算啊 求极限lim(x~0)((e^x+e^2x+e^3x)/3)^1/x 1.4求极限lim(x→∞) (x^2+x)/ (x^4-3x^+1) 求极限lim((1-x)^0.5-3)/(2+x^(1/3)) (x趋近于-8)