设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0
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设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0f''(x)=-
设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0
设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0
设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0
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f'(x)对称轴为2a
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设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0
设函数f(x)=-1/3x^3+2ax^2-3a^2x+b,0