對(duì)于給定區(qū)間上的函數(shù)f(x),如果對(duì)于屬于這個(gè)區(qū)間的任意兩個(gè)自變量的值x1,x2,(1)當(dāng)x1<x2時(shí),都有f(x1)<f(x2),那么就說(shuō)f(x)在這個(gè)區(qū)間上是增函數(shù);(2)當(dāng)x1<x2時(shí),都有f(x1)>f(x2),那么就說(shuō)f(x)在這個(gè)區(qū)間上是減函數(shù). (本文共 141 字 ) [閱讀本文] >>
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 對(duì)于給定區(qū)間上的函數(shù)f(x),如果對(duì)于屬于這個(gè)區(qū)間的任意兩個(gè)自變量的值x1,x2,(1)當(dāng)x1<x2時(shí),都有f(x1)<f(x2),那么就說(shuō)f(x)在這個(gè)區(qū)間上是增函數(shù);(2)當(dāng)x1<x2時(shí),都有f(x1)>f(x2),那么就說(shuō)f(x)在這個(gè)區(qū)間上是減函數(shù). (本文共 141 字 ) [閱讀本文] >>