题目内容
(请给出正确答案)
[单选题]
设f(x)为偶函数,g(x)为奇函数,则下列函数中为奇函数的是()
A.[g(x)]
B.[f(x)]
C.g[f(x)]
D.g[g(x)]
答案
D、g[g(x)]
解析:D项令T(X)=G[G(X)]因为T(-X)=G[G(-X)]=G[-G(X)]=-G[G(X)]所以T(-X)=-T(X)所以G[G(X)]为奇函数
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A.[g(x)]
B.[f(x)]
C.g[f(x)]
D.g[g(x)]
D、g[g(x)]
解析:D项令T(X)=G[G(X)]因为T(-X)=G[G(-X)]=G[-G(X)]=-G[G(X)]所以T(-X)=-T(X)所以G[G(X)]为奇函数
设f(x)为奇函数,g(x)为偶函数,问以下函数是奇函数的是( ).
(A)f[f(x)] (B)g[f(x)] (C)f[g(x)] (D)g[g(x)]
A.﹣9
B.9
C.﹣3
D.3
设f(x),g(x)在区间[-a,a](a>0)上连续,g(x)为偶函数,f(x)满足f(x)+f(-x)=A(A为常数).试证
并用该等式计算积分;
函数f(x)在(-∞,+∞)内有定义,f(x)不恒等于1,下列给出的函数中,哪些必为奇函数?哪些必为偶函数?