一道数学题:在R上定义的函数f(x)是偶函数,切f(x)=f(2-x),若f(x)在区间[1.2]是减函数,则函数f(x)为?A:在区间[-2,-1]上是增函数,[3,4]上是增函数B:在区间[-2,-1]上是增函数,[3,4]上是-函数C:在区间[-2,-1
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![一道数学题:在R上定义的函数f(x)是偶函数,切f(x)=f(2-x),若f(x)在区间[1.2]是减函数,则函数f(x)为?A:在区间[-2,-1]上是增函数,[3,4]上是增函数B:在区间[-2,-1]上是增函数,[3,4]上是-函数C:在区间[-2,-1](/uploads/image/z/989000-8-0.jpg?t=%E4%B8%80%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%9A%E5%9C%A8R%E4%B8%8A%E5%AE%9A%E4%B9%89%E7%9A%84%E5%87%BD%E6%95%B0f%28x%29%E6%98%AF%E5%81%B6%E5%87%BD%E6%95%B0%2C%E5%88%87f%28x%29%3Df%282-x%29%2C%E8%8B%A5f%28x%29%E5%9C%A8%E5%8C%BA%E9%97%B4%5B1.2%5D%E6%98%AF%E5%87%8F%E5%87%BD%E6%95%B0%2C%E5%88%99%E5%87%BD%E6%95%B0f%28x%29%E4%B8%BA%3FA%3A%E5%9C%A8%E5%8C%BA%E9%97%B4%5B-2%2C-1%5D%E4%B8%8A%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0%EF%BC%8C%5B3%2C4%5D%E4%B8%8A%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0B%3A%E5%9C%A8%E5%8C%BA%E9%97%B4%5B-2%2C-1%5D%E4%B8%8A%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0%EF%BC%8C%5B3%2C4%5D%E4%B8%8A%E6%98%AF-%E5%87%BD%E6%95%B0C%3A%E5%9C%A8%E5%8C%BA%E9%97%B4%5B-2%2C-1)
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