已知函数y=x^-2.(1)它在(0,+∞)上是增函数还是减函数?(2)它在(—∞,0)上是增函数还是减函数?
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![已知函数y=x^-2.(1)它在(0,+∞)上是增函数还是减函数?(2)它在(—∞,0)上是增函数还是减函数?](/uploads/image/z/5497129-1-9.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0y%3Dx%5E-2.%EF%BC%881%EF%BC%89%E5%AE%83%E5%9C%A8%EF%BC%880%2C%2B%E2%88%9E%EF%BC%89%E4%B8%8A%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0%E8%BF%98%E6%98%AF%E5%87%8F%E5%87%BD%E6%95%B0%3F%EF%BC%882%EF%BC%89%E5%AE%83%E5%9C%A8%EF%BC%88%E2%80%94%E2%88%9E%2C0%EF%BC%89%E4%B8%8A%E6%98%AF%E5%A2%9E%E5%87%BD%E6%95%B0%E8%BF%98%E6%98%AF%E5%87%8F%E5%87%BD%E6%95%B0%3F)
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