高中数学函数一道题定义中y=log(a)x,(a>0且a≠1)若a<1,则图像是单调递减的.若a>1,则递增.那么有的题是这么问的 判断函数y=log(1/3)x^2-4x+5的单调区间.这怎么回事?这个函数不也是近似可以看做
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![高中数学函数一道题定义中y=log(a)x,(a>0且a≠1)若a<1,则图像是单调递减的.若a>1,则递增.那么有的题是这么问的 判断函数y=log(1/3)x^2-4x+5的单调区间.这怎么回事?这个函数不也是近似可以看做](/uploads/image/z/1859985-9-5.jpg?t=%E9%AB%98%E4%B8%AD%E6%95%B0%E5%AD%A6%E5%87%BD%E6%95%B0%E4%B8%80%E9%81%93%E9%A2%98%E5%AE%9A%E4%B9%89%E4%B8%ADy%3Dlog%28a%29x%2C%28a%EF%BC%9E0%E4%B8%94a%E2%89%A01%29%E8%8B%A5a%EF%BC%9C1%2C%E5%88%99%E5%9B%BE%E5%83%8F%E6%98%AF%E5%8D%95%E8%B0%83%E9%80%92%E5%87%8F%E7%9A%84.%E8%8B%A5a%EF%BC%9E1%2C%E5%88%99%E9%80%92%E5%A2%9E.%E9%82%A3%E4%B9%88%E6%9C%89%E7%9A%84%E9%A2%98%E6%98%AF%E8%BF%99%E4%B9%88%E9%97%AE%E7%9A%84+%E5%88%A4%E6%96%AD%E5%87%BD%E6%95%B0y%3Dlog%281%2F3%29x%5E2-4x%2B5%E7%9A%84%E5%8D%95%E8%B0%83%E5%8C%BA%E9%97%B4.%E8%BF%99%E6%80%8E%E4%B9%88%E5%9B%9E%E4%BA%8B%3F%E8%BF%99%E4%B8%AA%E5%87%BD%E6%95%B0%E4%B8%8D%E4%B9%9F%E6%98%AF%E8%BF%91%E4%BC%BC%E5%8F%AF%E4%BB%A5%E7%9C%8B%E5%81%9A)
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