答 設(shè)函數(shù)f(x)的定義域?yàn)镈,區(qū)間I⊂D.如果ᗄx1,x2∈I,且x1<x2時(shí),恒有f(x1)<f(x2),則稱(chēng)f(x)在區(qū)間I上是單調(diào)增加的.如果ᗄx1,x2∈I,且x1<x2時(shí),恒有f(x1)>f(x2),則稱(chēng)f(x)在區(qū)間I上是單調(diào)減少的.單調(diào)增加和單調(diào)減少的函數(shù)統(tǒng)稱(chēng)為單 (本文共 177 字 ) [閱讀本文] >>