f(x)=x²(1-x)³求导f'(x)=2x(1-x)³+3x²(1-x)² =(2x-2x²+3x²)(1-x)² =(2x+x²)(1-x)² =x(x+2)(x-1)²当 f'(x)=0得x=0 或 x=-2 或 x=1在 x=-2 取极大值f(-...