Question

函數(shù)y＝的單調(diào)遞增區(qū)間是________．

Answer 1

答案：[1，＋∞)
解析：

函數(shù)的定義域是x≥1．設(shè)y＝，u＝x－1，函數(shù)y＝，u＝x－1均是增函數(shù)，則函數(shù)y＝在定義域上是增函數(shù)．