f(x)=-2x²+6x对称轴x=-6/(-4)=3/2二次函数的图像开口向下∴ f(x)在(-2,3/2)上递增,在(3/2,2)上递增∴ f(x)的最大值为f(3/2)=-2*(3/2)²+6*(3/2)=-9/2+9=9/2又∵ f(-2)=-8-12=-20,f(2)=-8+12=4∴ f(x)的值域...