1.已知函数f(x)=(1/2)的x次方+(1/4)的x次方-2.求函数的值域.请把过程写完整,谢啦.
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![1.已知函数f(x)=(1/2)的x次方+(1/4)的x次方-2.求函数的值域.请把过程写完整,谢啦.](/uploads/image/z/11969500-4-0.jpg?t=1.%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%EF%BC%88x%EF%BC%89%3D%EF%BC%881%2F2%EF%BC%89%E7%9A%84x%E6%AC%A1%E6%96%B9%EF%BC%8B%EF%BC%881%2F4%EF%BC%89%E7%9A%84x%E6%AC%A1%E6%96%B9%EF%BC%8D2.%E6%B1%82%E5%87%BD%E6%95%B0%E7%9A%84%E5%80%BC%E5%9F%9F.%E8%AF%B7%E6%8A%8A%E8%BF%87%E7%A8%8B%E5%86%99%E5%AE%8C%E6%95%B4%2C%E8%B0%A2%E5%95%A6.)
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