作业帮已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)的图象在点(1,f(1))处的切线方程为x+y-3=0求在区间[-2,4]上的最大值
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![已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)的图象在点(1,f(1))处的切线方程为x+y-3=0求在区间[-2,4]上的最大值](/uploads/image/z/5444795-11-5.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D1%2F3x3-ax2%2B%28a2-1%29x%2Bb+%28a%2Cb%E5%B1%9E%E4%BA%8ER%29+%2C%E8%8B%A5y%3Df%28x%29%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D1%2F3x3-ax2%2B%28a2-1%29x%2Bb+%28a%2Cb%E5%B1%9E%E4%BA%8ER%29+%2C%E8%8B%A5y%3Df%28x%29%E7%9A%84%E5%9B%BE%E8%B1%A1%E5%9C%A8%E7%82%B9%281%2Cf%281%29%29%E5%A4%84%E7%9A%84%E5%88%87%E7%BA%BF%E6%96%B9%E7%A8%8B%E4%B8%BAx%2By-3%3D0%E6%B1%82%E5%9C%A8%E5%8C%BA%E9%97%B4%5B-2%2C4%5D%E4%B8%8A%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC)
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已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)的图象在点(1,f(1))处的切线方程为x+y-3=0求在区间[-2,4]上的最大值
已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)
已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)的图象在点(1,f(1))处的切线方程为x+y-3=0求在区间[-2,4]上的最大值
已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)已知函数f(x)=1/3x3-ax2+(a2-1)x+b (a,b属于R) ,若y=f(x)的图象在点(1,f(1))处的切线方程为x+y-3=0求在区间[-2,4]上的最大值
f'(x)=x^2-2ax+a^2-1
切线斜率为-1
1-2a+a^2-1=-1
a=1
切点x=1,y=2
1/3-1+b=2
b=8/3
f(x)=x^3/3-x^2+8/3
f'(x)=x(x-2)
x