已知函数f(x)=1/x+aln(x+1) (1)当a=2时,求函数f(x)的单调区间和极值 (2)已知函数f(x)=1/x+aln(x+1)(1)当a=2时,求函数f(x)的单调区间和极值(2)若函数f(x)当x属于[2,4]时为单调函数,求实数a的取值范围.
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![已知函数f(x)=1/x+aln(x+1) (1)当a=2时,求函数f(x)的单调区间和极值 (2)已知函数f(x)=1/x+aln(x+1)(1)当a=2时,求函数f(x)的单调区间和极值(2)若函数f(x)当x属于[2,4]时为单调函数,求实数a的取值范围.](/uploads/image/z/6893562-66-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D1%2Fx%2Baln%28x%2B1%29+%281%29%E5%BD%93a%3D2%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%E5%92%8C%E6%9E%81%E5%80%BC+%282%29%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D1%2Fx%2Baln%28x%2B1%29%281%29%E5%BD%93a%3D2%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%E5%92%8C%E6%9E%81%E5%80%BC%282%29%E8%8B%A5%E5%87%BD%E6%95%B0f%28x%29%E5%BD%93x%E5%B1%9E%E4%BA%8E%5B2%2C4%5D%E6%97%B6%E4%B8%BA%E5%8D%95%E8%B0%83%E5%87%BD%E6%95%B0%2C%E6%B1%82%E5%AE%9E%E6%95%B0a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4.)
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