函数的导数为：y'=4x-4x^3令y'=0得x=0,x=1x(-∞,0) 0(0,1) 1 (1,+∞)y' ++ -yx=0无极值x=1有极大值为y=1所以函数的导数为：y'=4x-4x^3,在x=1有极大值为y=1...