已知函数f(x)=loga(x)和g(x)=2loga(2x+t-2),(a>0,a≠1,t∈R)(1)当t=4,x∈[1,2],且F(x)=g(x)-f(x)有最小值2时,求a的值(2)当0<a<1,x∈[1,2]时,有f(x)≥g(x)恒成立,求实数t的取值范围求大神回答……
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![已知函数f(x)=loga(x)和g(x)=2loga(2x+t-2),(a>0,a≠1,t∈R)(1)当t=4,x∈[1,2],且F(x)=g(x)-f(x)有最小值2时,求a的值(2)当0<a<1,x∈[1,2]时,有f(x)≥g(x)恒成立,求实数t的取值范围求大神回答……](/uploads/image/z/1857404-20-4.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%3Dloga%28x%29%E5%92%8Cg%28x%29%3D2loga%282x%2Bt-2%29%2C%28a%3E0%2Ca%E2%89%A01%2Ct%E2%88%88R%29%281%29%E5%BD%93t%3D4%2Cx%E2%88%88%5B1%2C2%5D%2C%E4%B8%94F%28x%29%3Dg%28x%29-f%28x%29%E6%9C%89%E6%9C%80%E5%B0%8F%E5%80%BC2%E6%97%B6%2C%E6%B1%82a%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89%E5%BD%930%EF%BC%9Ca%EF%BC%9C1%2Cx%E2%88%88%5B1%2C2%5D%E6%97%B6%2C%E6%9C%89f%28x%29%E2%89%A5g%28x%29%E6%81%92%E6%88%90%E7%AB%8B%2C%E6%B1%82%E5%AE%9E%E6%95%B0t%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%B1%82%E5%A4%A7%E7%A5%9E%E5%9B%9E%E7%AD%94%E2%80%A6%E2%80%A6)
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