f(x)=(1/3)(x^3)+(a-6)x+(4-2a)lnx,g(x)=-x^2+2x+b……(1)若a=5,对于所有x1,x2属于(0,正无穷)都有f(x1)>g(x2) 求b取值范围……(2)若f(x)在(0,m),(n,正无穷)上递增,在(m,n)递减,求a取值范围……求解答,能做
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![f(x)=(1/3)(x^3)+(a-6)x+(4-2a)lnx,g(x)=-x^2+2x+b……(1)若a=5,对于所有x1,x2属于(0,正无穷)都有f(x1)>g(x2) 求b取值范围……(2)若f(x)在(0,m),(n,正无穷)上递增,在(m,n)递减,求a取值范围……求解答,能做](/uploads/image/z/8856145-1-5.jpg?t=f%28x%29%3D%281%2F3%29%28x%5E3%29%2B%28a-6%29x%2B%284-2a%29lnx%2Cg%28x%29%3D-x%5E2%2B2x%2Bb%E2%80%A6%E2%80%A6%EF%BC%881%EF%BC%89%E8%8B%A5a%3D5%2C%E5%AF%B9%E4%BA%8E%E6%89%80%E6%9C%89x1%2Cx2%E5%B1%9E%E4%BA%8E%EF%BC%880%2C%E6%AD%A3%E6%97%A0%E7%A9%B7%EF%BC%89%E9%83%BD%E6%9C%89f%28x1%29%3Eg%28x2%29+%E6%B1%82b%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E2%80%A6%E2%80%A6%EF%BC%882%EF%BC%89%E8%8B%A5f%28x%29%E5%9C%A8%EF%BC%880%2Cm%EF%BC%89%2C%28n%2C%E6%AD%A3%E6%97%A0%E7%A9%B7%29%E4%B8%8A%E9%80%92%E5%A2%9E%2C%E5%9C%A8%28m%2Cn%29%E9%80%92%E5%87%8F%2C%E6%B1%82a%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E2%80%A6%E2%80%A6%E6%B1%82%E8%A7%A3%E7%AD%94%2C%E8%83%BD%E5%81%9A)
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