求函数f(x)=x^2-2x-1/x^2-5x+6的值域如题,这道题我把这个函数化简成了f(x)=1+2/x+3+1/x-2,但还是没法做……类似的上面也是二次三项式,下面也是二次三项式的函数怎样求值域啊?我打规范点吧:我把
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![求函数f(x)=x^2-2x-1/x^2-5x+6的值域如题,这道题我把这个函数化简成了f(x)=1+2/x+3+1/x-2,但还是没法做……类似的上面也是二次三项式,下面也是二次三项式的函数怎样求值域啊?我打规范点吧:我把](/uploads/image/z/3025186-34-6.jpg?t=%E6%B1%82%E5%87%BD%E6%95%B0f%28x%29%3Dx%5E2-2x-1%2Fx%5E2-5x%2B6%E7%9A%84%E5%80%BC%E5%9F%9F%E5%A6%82%E9%A2%98%2C%E8%BF%99%E9%81%93%E9%A2%98%E6%88%91%E6%8A%8A%E8%BF%99%E4%B8%AA%E5%87%BD%E6%95%B0%E5%8C%96%E7%AE%80%E6%88%90%E4%BA%86f%28x%29%3D1%2B2%2Fx%2B3%2B1%2Fx-2%2C%E4%BD%86%E8%BF%98%E6%98%AF%E6%B2%A1%E6%B3%95%E5%81%9A%E2%80%A6%E2%80%A6%E7%B1%BB%E4%BC%BC%E7%9A%84%E4%B8%8A%E9%9D%A2%E4%B9%9F%E6%98%AF%E4%BA%8C%E6%AC%A1%E4%B8%89%E9%A1%B9%E5%BC%8F%2C%E4%B8%8B%E9%9D%A2%E4%B9%9F%E6%98%AF%E4%BA%8C%E6%AC%A1%E4%B8%89%E9%A1%B9%E5%BC%8F%E7%9A%84%E5%87%BD%E6%95%B0%E6%80%8E%E6%A0%B7%E6%B1%82%E5%80%BC%E5%9F%9F%E5%95%8A%3F%E6%88%91%E6%89%93%E8%A7%84%E8%8C%83%E7%82%B9%E5%90%A7%EF%BC%9A%E6%88%91%E6%8A%8A)
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