(1)e³=e^limln(1+x+f(x)/x)/x极限存在，故f(0)=0，limf(x)/x=0故f'(0)=03=lim(x+f(x)/x)/x=lim1+f(x)/x²，故f''(0)=4(2)=e^limln(1+f(x)/x)/x=e^limf(x)/x²=e^2
