集合A={x|2x-1|>1},集合B={y|y=|logax|,x∈[m,n],a>1},若B=CRA且n-m的最小值为 1/2,则a= ∵{x|0≤x≤1}是y=|logax|,x∈[m,n]的值域∴当x=1时y=|logax才有最小值0∴n必为1而n-m的最小值为 1/2∴m=1/2∵{x|0≤x≤1}是y=|log
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![集合A={x|2x-1|>1},集合B={y|y=|logax|,x∈[m,n],a>1},若B=CRA且n-m的最小值为 1/2,则a= ∵{x|0≤x≤1}是y=|logax|,x∈[m,n]的值域∴当x=1时y=|logax才有最小值0∴n必为1而n-m的最小值为 1/2∴m=1/2∵{x|0≤x≤1}是y=|log](/uploads/image/z/15178553-17-3.jpg?t=%E9%9B%86%E5%90%88A%3D%7Bx%7C2x-1%7C%3E1%7D%2C%E9%9B%86%E5%90%88B%3D%7By%7Cy%3D%7Clogax%7C%2Cx%E2%88%88%5Bm%2Cn%5D%2Ca%EF%BC%9E1%7D%2C%E8%8B%A5B%3DCRA%E4%B8%94n-m%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E4%B8%BA+1%2F2%2C%E5%88%99a%3D+%E2%88%B5%7Bx%7C0%E2%89%A4x%E2%89%A41%7D%E6%98%AFy%3D%7Clogax%7C%2Cx%E2%88%88%5Bm%2Cn%5D%E7%9A%84%E5%80%BC%E5%9F%9F%E2%88%B4%E5%BD%93x%3D1%E6%97%B6y%3D%7Clogax%E6%89%8D%E6%9C%89%E6%9C%80%E5%B0%8F%E5%80%BC0%E2%88%B4n%E5%BF%85%E4%B8%BA1%E8%80%8Cn-m%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E4%B8%BA+1%2F2%E2%88%B4m%3D1%2F2%E2%88%B5%7Bx%7C0%E2%89%A4x%E2%89%A41%7D%E6%98%AFy%3D%7Clog)
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