填空题:1.已知集合A={1,2},集合B={x|x²-ax+a-1=0},A∪B=A,则实数a的值为_______.2.已知集合A={x|x<1或x>5},B={x|a≤x≤b},且A∪B=R,A∩B={x|5<x≤6},则2a-b=__.3.已知区间[-2a,3a+5],则a的取值范围是______.4.函
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![填空题:1.已知集合A={1,2},集合B={x|x²-ax+a-1=0},A∪B=A,则实数a的值为_______.2.已知集合A={x|x<1或x>5},B={x|a≤x≤b},且A∪B=R,A∩B={x|5<x≤6},则2a-b=__.3.已知区间[-2a,3a+5],则a的取值范围是______.4.函](/uploads/image/z/2702732-68-2.jpg?t=%E5%A1%AB%E7%A9%BA%E9%A2%98%EF%BC%9A1.%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A%3D%7B1%2C2%7D%2C%E9%9B%86%E5%90%88B%3D%7Bx%7Cx%26sup2%3B-ax%2Ba-1%3D0%7D%2CA%E2%88%AAB%3DA%2C%E5%88%99%E5%AE%9E%E6%95%B0a%E7%9A%84%E5%80%BC%E4%B8%BA_______.2.%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A%3D%7Bx%7Cx%EF%BC%9C1%E6%88%96x%EF%BC%9E5%7D%2CB%3D%7Bx%7Ca%E2%89%A4x%E2%89%A4b%7D%2C%E4%B8%94A%E2%88%AAB%3DR%2CA%E2%88%A9B%3D%7Bx%7C5%EF%BC%9Cx%E2%89%A46%7D%2C%E5%88%992a-b%3D__.3.%E5%B7%B2%E7%9F%A5%E5%8C%BA%E9%97%B4%5B-2a%2C3a%2B5%5D%2C%E5%88%99a%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF______.4.%E5%87%BD)
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