已知函数f(x)=(x^2+b)分之ax在x=1处取得极值2.(1)求函数f(x)的解析式;(2)实数k满足什么条件时,函数f(x)在区间(2k,4k+1)上单调递增?
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![已知函数f(x)=(x^2+b)分之ax在x=1处取得极值2.(1)求函数f(x)的解析式;(2)实数k满足什么条件时,函数f(x)在区间(2k,4k+1)上单调递增?](/uploads/image/z/14548234-58-4.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3D%28x%5E2%2Bb%29%E5%88%86%E4%B9%8Bax%E5%9C%A8x%3D1%E5%A4%84%E5%8F%96%E5%BE%97%E6%9E%81%E5%80%BC2.%281%29%E6%B1%82%E5%87%BD%E6%95%B0f%28x%29%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F%EF%BC%9B%EF%BC%882%EF%BC%89%E5%AE%9E%E6%95%B0k%E6%BB%A1%E8%B6%B3%E4%BB%80%E4%B9%88%E6%9D%A1%E4%BB%B6%E6%97%B6%2C%E5%87%BD%E6%95%B0f%28x%29%E5%9C%A8%E5%8C%BA%E9%97%B4%EF%BC%882k%2C4k%2B1%EF%BC%89%E4%B8%8A%E5%8D%95%E8%B0%83%E9%80%92%E5%A2%9E%3F)
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