定义域为R的函数f(x)满足:对于任意的实数xy都有f(x+y)=f(x)+f(y)成立.且当x大于0时 f(x)小于0恒成立1 判断函数f(x)的积偶性 并证明2 证明f(x)为减函数 若函数f(x)在[-3.3)上总有f(x)小
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![定义域为R的函数f(x)满足:对于任意的实数xy都有f(x+y)=f(x)+f(y)成立.且当x大于0时 f(x)小于0恒成立1 判断函数f(x)的积偶性 并证明2 证明f(x)为减函数 若函数f(x)在[-3.3)上总有f(x)小](/uploads/image/z/5922996-60-6.jpg?t=%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BAR%E7%9A%84%E5%87%BD%E6%95%B0f%28x%29%E6%BB%A1%E8%B6%B3%EF%BC%9A%E5%AF%B9%E4%BA%8E%E4%BB%BB%E6%84%8F%E7%9A%84%E5%AE%9E%E6%95%B0xy%E9%83%BD%E6%9C%89f%28x%2By%29%3Df%28x%29%2Bf%28y%29%E6%88%90%E7%AB%8B.%E4%B8%94%E5%BD%93x%E5%A4%A7%E4%BA%8E0%E6%97%B6+f%EF%BC%88x%EF%BC%89%E5%B0%8F%E4%BA%8E0%E6%81%92%E6%88%90%E7%AB%8B1+%E5%88%A4%E6%96%AD%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E7%9A%84%E7%A7%AF%E5%81%B6%E6%80%A7+%E5%B9%B6%E8%AF%81%E6%98%8E2+%E8%AF%81%E6%98%8Ef%EF%BC%88x%EF%BC%89%E4%B8%BA%E5%87%8F%E5%87%BD%E6%95%B0+%E8%8B%A5%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E5%9C%A8%5B-3.3%29%E4%B8%8A%E6%80%BB%E6%9C%89f%EF%BC%88x%EF%BC%89%E5%B0%8F)
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