已知f(x)定义域[-7.7]上的偶函数,且在[0,7]上为单调递减1.求f(x²+1)<(2),求x取值范围2.当0≤a≤3时,比较f(-3/4)和(a²-a+1)的大小
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![已知f(x)定义域[-7.7]上的偶函数,且在[0,7]上为单调递减1.求f(x²+1)<(2),求x取值范围2.当0≤a≤3时,比较f(-3/4)和(a²-a+1)的大小](/uploads/image/z/12360380-68-0.jpg?t=%E5%B7%B2%E7%9F%A5f%28x%29%E5%AE%9A%E4%B9%89%E5%9F%9F%5B-7.7%5D%E4%B8%8A%E7%9A%84%E5%81%B6%E5%87%BD%E6%95%B0%2C%E4%B8%94%E5%9C%A8%5B0%2C7%5D%E4%B8%8A%E4%B8%BA%E5%8D%95%E8%B0%83%E9%80%92%E5%87%8F1.%E6%B1%82f%28x%26%23178%3B%2B1%29%EF%BC%9C%282%29%2C%E6%B1%82x%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B42.%E5%BD%930%E2%89%A4a%E2%89%A43%E6%97%B6%2C%E6%AF%94%E8%BE%83f%28-3%2F4%29%E5%92%8C%28a%26%23178%3B-a%2B1%29%E7%9A%84%E5%A4%A7%E5%B0%8F)
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