已知函数f(x)的定义域为(-1,1),且满足①f(x)是奇函数;②f(x)在定义域递减;③f(1-a)+f(-a )<.求a的取值范围.
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![已知函数f(x)的定义域为(-1,1),且满足①f(x)是奇函数;②f(x)在定义域递减;③f(1-a)+f(-a )<.求a的取值范围.](/uploads/image/z/11627972-44-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BA%EF%BC%88-1%2C1%EF%BC%89%2C%E4%B8%94%E6%BB%A1%E8%B6%B3%E2%91%A0f%EF%BC%88x%EF%BC%89%E6%98%AF%E5%A5%87%E5%87%BD%E6%95%B0%EF%BC%9B%E2%91%A1f%EF%BC%88x%EF%BC%89%E5%9C%A8%E5%AE%9A%E4%B9%89%E5%9F%9F%E9%80%92%E5%87%8F%EF%BC%9B%E2%91%A2f%281-a%29%2Bf%28-a+%29%EF%BC%9C.%E6%B1%82a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4.)
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