若函数f(x)=a|x-b|+2在【0,正无穷)上为增函数,求实数a,b的取值范围.当x>b时,有f(x)的导数a,a>0时为增函数当x
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![若函数f(x)=a|x-b|+2在【0,正无穷)上为增函数,求实数a,b的取值范围.当x>b时,有f(x)的导数a,a>0时为增函数当x](/uploads/image/z/10196939-11-9.jpg?t=%E8%8B%A5%E5%87%BD%E6%95%B0f%28x%29%3Da%7Cx-b%7C%2B2%E5%9C%A8%E3%80%900%2C%E6%AD%A3%E6%97%A0%E7%A9%B7%EF%BC%89%E4%B8%8A%E4%B8%BA%E5%A2%9E%E5%87%BD%E6%95%B0%2C%E6%B1%82%E5%AE%9E%E6%95%B0a%2Cb%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4.%E5%BD%93x%3Eb%E6%97%B6%2C%E6%9C%89f%28x%29%E7%9A%84%E5%AF%BC%E6%95%B0a%2Ca%3E0%E6%97%B6%E4%B8%BA%E5%A2%9E%E5%87%BD%E6%95%B0%E5%BD%93x)
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