已知f(x)=x/x+2.证明:f(x)在(-无穷,-2内单调递增)

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已知f(x)=x/x+2.证明:f(x)在(-无穷,-2内单调递增)已知f(x)=x/x+2.证明:f(x)在(-无穷,-2内单调递增)已知f(x)=x/x+2.证明:f(x)在(-无穷,-2内单调递

已知f(x)=x/x+2.证明:f(x)在(-无穷,-2内单调递增)
已知f(x)=x/x+2.证明:f(x)在(-无穷,-2内单调递增)

已知f(x)=x/x+2.证明:f(x)在(-无穷,-2内单调递增)