解 φ(x)=[f(x)+f(-x)]=2x2-3,ψ(x)=[f(x)-f(-x)]=6x.所以,φ(x)是偶函數(shù),ψ(x)是奇函數(shù). (本文共 68 字 ) [f(x)+f(-x)]及ψ(x)=[f(x)-f(-x)],并指出φ(x)及ψ(x)中哪個(gè)是奇函數(shù),哪個(gè)是偶函數(shù)?" href="javascript:void(0)"> [閱讀本文] >>
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 解 φ(x)=[f(x)+f(-x)]=2x2-3,ψ(x)=[f(x)-f(-x)]=6x.所以,φ(x)是偶函數(shù),ψ(x)是奇函數(shù). (本文共 68 字 ) [f(x)+f(-x)]及ψ(x)=[f(x)-f(-x)],并指出φ(x)及ψ(x)中哪個(gè)是奇函數(shù),哪個(gè)是偶函數(shù)?" href="javascript:void(0)"> [閱讀本文] >>