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Gaokao Math Practice Question

3. (5 分) 设函数 $f(x), g(x)$ 的定义域都为 $R$, 且 $f(x)$ 是奇函数, $g(x)$ 是偶函数,则下列结论正确的是( )

  1. A.$f(x) \bullet g(x)$ 是偶函数
  2. B.$|f(x)| \bullet g(x)$ 是奇函数
  3. C.$f(x) \bullet|g(x)|$ 是奇函数
  4. D.$|f(x) \cdot g(x)|$ 是奇函数

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