f(x)=-x³+3x²+9x+a,若f(x)在[-2,2]上最大值为x>0,求最小值
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f(x)=-x³+3x²+9x+a,若f(x)在[-2,2]上最大值为x>0,求最小值
f(x)=-x³+3x²+9x+a,若f(x)在[-2,2]上最大值为x>0,求最小值
f(x)=-x³+3x²+9x+a,若f(x)在[-2,2]上最大值为x>0,求最小值
最大值为?
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