已知函数f(x)=x^2+2x+alnx.(1)当a=-4,求函数f(x)的极值.(2)讨论函数f(x)的单调增区间.(3)当t≥1时,不等式f(2t-1)≥2f(t)-3 试求a的取值范围
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![已知函数f(x)=x^2+2x+alnx.(1)当a=-4,求函数f(x)的极值.(2)讨论函数f(x)的单调增区间.(3)当t≥1时,不等式f(2t-1)≥2f(t)-3 试求a的取值范围](/uploads/image/z/5439485-29-5.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3Dx%5E2%2B2x%2Balnx.%EF%BC%881%EF%BC%89%E5%BD%93a%3D-4%2C%E6%B1%82%E5%87%BD%E6%95%B0f%28x%29%E7%9A%84%E6%9E%81%E5%80%BC.%EF%BC%882%EF%BC%89%E8%AE%A8%E8%AE%BA%E5%87%BD%E6%95%B0f%28x%29%E7%9A%84%E5%8D%95%E8%B0%83%E5%A2%9E%E5%8C%BA%E9%97%B4.%EF%BC%883%EF%BC%89%E5%BD%93t%E2%89%A51%E6%97%B6%2C%E4%B8%8D%E7%AD%89%E5%BC%8Ff%282t-1%29%E2%89%A52f%28t%29-3+%E8%AF%95%E6%B1%82a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4)
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