1.若f(x)和g(x)都是定义在R上的函数,且满足f(x-y)=f(x)g(y)-g(x)f(y),f(-2)=f(1)≠0,则求出 g(1)+g(-1)的值 2.若函数f(x)的值域是[1/2,3],则函数F(x)=f(x)+1/f(x)的值域是?PS:
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![1.若f(x)和g(x)都是定义在R上的函数,且满足f(x-y)=f(x)g(y)-g(x)f(y),f(-2)=f(1)≠0,则求出 g(1)+g(-1)的值 2.若函数f(x)的值域是[1/2,3],则函数F(x)=f(x)+1/f(x)的值域是?PS:](/uploads/image/z/10122650-26-0.jpg?t=1.%E8%8B%A5f%EF%BC%88x%EF%BC%89%E5%92%8Cg%EF%BC%88x%EF%BC%89%E9%83%BD%E6%98%AF%E5%AE%9A%E4%B9%89%E5%9C%A8R%E4%B8%8A%E7%9A%84%E5%87%BD%E6%95%B0%2C%E4%B8%94%E6%BB%A1%E8%B6%B3f%EF%BC%88x-y%EF%BC%89%3Df%EF%BC%88x%EF%BC%89g%EF%BC%88y%EF%BC%89-g%EF%BC%88x%EF%BC%89f%EF%BC%88y%EF%BC%89%2Cf%EF%BC%88-2%29%3Df%281%29%E2%89%A00%2C%E5%88%99%E6%B1%82%E5%87%BA+g%EF%BC%881%EF%BC%89%2Bg%EF%BC%88-1%EF%BC%89%E7%9A%84%E5%80%BC+2.%E8%8B%A5%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%E7%9A%84%E5%80%BC%E5%9F%9F%E6%98%AF%5B1%2F2%2C3%5D%2C%E5%88%99%E5%87%BD%E6%95%B0F%EF%BC%88x%EF%BC%89%3Df%EF%BC%88x%EF%BC%89%2B1%2Ff%28x%29%E7%9A%84%E5%80%BC%E5%9F%9F%E6%98%AF%3FPS%EF%BC%9A)
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