已知函数f(x)在实数集中满足f(xy)=f(x)+f(y),且f(x)在定义域内是减函数 (1)求f(1)值
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![已知函数f(x)在实数集中满足f(xy)=f(x)+f(y),且f(x)在定义域内是减函数 (1)求f(1)值](/uploads/image/z/3018074-50-4.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%E5%9C%A8%E5%AE%9E%E6%95%B0%E9%9B%86%E4%B8%AD%E6%BB%A1%E8%B6%B3f%28xy%29%3Df%28x%29%2Bf%28y%29%2C%E4%B8%94f%28x%29%E5%9C%A8%E5%AE%9A%E4%B9%89%E5%9F%9F%E5%86%85%E6%98%AF%E5%87%8F%E5%87%BD%E6%95%B0+%EF%BC%881%EF%BC%89%E6%B1%82f%281%29%E5%80%BC)
已知函数f(x)在实数集中满足f(xy)=f(x)+f(y),且f(x)在定义域内是减函数 (1)求f(1)值
已知函数f(x)在实数集中满足f(xy)=f(x)+f(y),且f(x)在定义域内是减函数 (1)求f(1)值
已知函数f(x)在实数集中满足f(xy)=f(x)+f(y),且f(x)在定义域内是减函数 (1)求f(1)值
f(1)=f(1*1)=f(1)+f(1) -> f(1)=0