选会做的做做的最多答案最详尽的给分、、、1.在锐角三角形ABC中,2tanB=tanA+tanC,且f(cos2C)=cos(B+C-A),则f(x)=_2.定义在(0,+无穷)上的增函数的f(x),且满足:f(xy)=f(x)+f(y),f(2)=1,则不等式f
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![选会做的做做的最多答案最详尽的给分、、、1.在锐角三角形ABC中,2tanB=tanA+tanC,且f(cos2C)=cos(B+C-A),则f(x)=_2.定义在(0,+无穷)上的增函数的f(x),且满足:f(xy)=f(x)+f(y),f(2)=1,则不等式f](/uploads/image/z/9940678-70-8.jpg?t=%E9%80%89%E4%BC%9A%E5%81%9A%E7%9A%84%E5%81%9A%E5%81%9A%E7%9A%84%E6%9C%80%E5%A4%9A%E7%AD%94%E6%A1%88%E6%9C%80%E8%AF%A6%E5%B0%BD%E7%9A%84%E7%BB%99%E5%88%86%E3%80%81%E3%80%81%E3%80%811.%E5%9C%A8%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C2tanB%3DtanA%2BtanC%2C%E4%B8%94f%EF%BC%88cos2C%EF%BC%89%3Dcos%28B%2BC-A%29%2C%E5%88%99f%EF%BC%88x%EF%BC%89%3D_2.%E5%AE%9A%E4%B9%89%E5%9C%A8%EF%BC%880%2C%2B%E6%97%A0%E7%A9%B7%EF%BC%89%E4%B8%8A%E7%9A%84%E5%A2%9E%E5%87%BD%E6%95%B0%E7%9A%84f%EF%BC%88x%EF%BC%89%2C%E4%B8%94%E6%BB%A1%E8%B6%B3%EF%BC%9Af%EF%BC%88xy%EF%BC%89%3Df%28x%29%2Bf%28y%29%2Cf%282%29%3D1%2C%E5%88%99%E4%B8%8D%E7%AD%89%E5%BC%8Ff)
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