1)y=e^xdy=e^xdxx=1,dx=0.01,dy=e^1 dx=0.01e所以e^1.01=e+0.01e=1.01e2)y=arctanx, dy=dx/(1+x^2)x=1,dx=0.02, dy=0.02/2=0.01所以arctan1.02=arctan1+0.01=π/4+0.01