已知函数f (x)=x|x-a|-In(x+1)(1)当a =0时,求函数f (x)的单调区间..(2)当a =-1时,若全部x 都属于[0,正无穷),f (x)小于等于(k +1)x的平方恒成立,求实数k 最小值.要具体过程,
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![已知函数f (x)=x|x-a|-In(x+1)(1)当a =0时,求函数f (x)的单调区间..(2)当a =-1时,若全部x 都属于[0,正无穷),f (x)小于等于(k +1)x的平方恒成立,求实数k 最小值.要具体过程,](/uploads/image/z/10256431-31-1.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f+%28x%29%3Dx%7Cx-a%7C-In%28x%2B1%29%281%29%E5%BD%93a+%3D0%E6%97%B6%2C%E6%B1%82%E5%87%BD%E6%95%B0f+%28x%29%E7%9A%84%E5%8D%95%E8%B0%83%E5%8C%BA%E9%97%B4..%282%29%E5%BD%93a+%3D-1%E6%97%B6%2C%E8%8B%A5%E5%85%A8%E9%83%A8x+%E9%83%BD%E5%B1%9E%E4%BA%8E%5B0%2C%E6%AD%A3%E6%97%A0%E7%A9%B7%29%2Cf+%28x%29%E5%B0%8F%E4%BA%8E%E7%AD%89%E4%BA%8E%28k+%2B1%29x%E7%9A%84%E5%B9%B3%E6%96%B9%E6%81%92%E6%88%90%E7%AB%8B%2C%E6%B1%82%E5%AE%9E%E6%95%B0k+%E6%9C%80%E5%B0%8F%E5%80%BC.%E8%A6%81%E5%85%B7%E4%BD%93%E8%BF%87%E7%A8%8B%2C)
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