已知f(x)的定义在(0,+∞)上的增函数且满足f(xy)=f(x)+f(y),f(2)=1.(1)求证:f(8) =3 (2) 求不等式f(x)已知f(x)的定义在(0,+∞)上的增函数且满足f(xy)=f(x)+f(y),f(2)=1。(1)求证:f(8)=3 (2) 求不等式f(x)-
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![已知f(x)的定义在(0,+∞)上的增函数且满足f(xy)=f(x)+f(y),f(2)=1.(1)求证:f(8) =3 (2) 求不等式f(x)已知f(x)的定义在(0,+∞)上的增函数且满足f(xy)=f(x)+f(y),f(2)=1。(1)求证:f(8)=3 (2) 求不等式f(x)-](/uploads/image/z/2535327-63-7.jpg?t=%E5%B7%B2%E7%9F%A5f%28x%29%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9C%A8%280%2C%2B%E2%88%9E%EF%BC%89%E4%B8%8A%E7%9A%84%E5%A2%9E%E5%87%BD%E6%95%B0%E4%B8%94%E6%BB%A1%E8%B6%B3f%28xy%29%3Df%28x%29%2Bf%28y%29%2Cf%282%29%3D1.%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9Af%288%29+%3D3+%282%29+%E6%B1%82%E4%B8%8D%E7%AD%89%E5%BC%8Ff%28x%29%E5%B7%B2%E7%9F%A5f%28x%29%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9C%A8%280%EF%BC%8C%2B%E2%88%9E%EF%BC%89%E4%B8%8A%E7%9A%84%E5%A2%9E%E5%87%BD%E6%95%B0%E4%B8%94%E6%BB%A1%E8%B6%B3f%28xy%29%3Df%28x%29%2Bf%28y%29%2Cf%282%29%3D1%E3%80%82%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9Af%288%29%3D3+%282%29+%E6%B1%82%E4%B8%8D%E7%AD%89%E5%BC%8Ff%28x%29-)
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