e^x=e^-xe^2x=12x=0x=0所以交点是(0,1)所以积分上下限是1和00e^-x所以面积是∫(0,1)(e^x-e^-x)dx=e^x+e^-x (0,1)=e+1/e-1-1=e+1/e-2
