设f(x)=a0x^n+a1x^(n-1)+……+an则系数和=a0+a1+……+an而x=1时,a0x^n+a1x^(n-1)+……+an=a0+a1+……+an所以系数和=f(1)n是奇数则奇数项是a0x^n,a2x^(n-2),……,a(n-1)*x偶数项是a1x^(n-1),a3x^(x-3),……,an而x=-1...