∵f(x)=√x x≥0
令0≤x1x1
∴√x2-√x1>0
∴f(x2)-f(x1)>0
∴f(x)在x在[0,+∞）上是增函數(shù)
證明f(x)等于根號下x在（0,正無窮）上是增函數(shù)
證明f(x)等于根號下x在（0,正無窮）上是增函數(shù)
數(shù)學(xué)人氣：604 ℃時(shí)間：2019-08-21 20:56:52
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