Af（x）=x^2-2x+a（e^（x-1）+e^（-x+1））aAg（x）=a（e^（x-1）+e^（-x+1））g（x）1213-121ee0x=1f（1）=1-2+a（1+1）=0a12........................g（x）=a（e^（x-1）+e^（-x+1））h（x）=2x-x2......g（x）=a[（e^（x-1））^2-1]e^（x-1）e^（x-1）0（e^（x-1））^2-1x1x1a00=0a0g（x）x1x11g（x）h（x）2a=1a=12......a0......a=0............x1f（2-x）......