求反函数f(x)=loga(x+根号x^2-1)
要过程 谢谢
人气：289 ℃ 时间：2019-09-21 06:37:39
解答
y=loga(x+根号(x^2-1))
x+根号(x^2-1)=a^y
x^2-1=(a^y-x)^2
a^2y-2xa^y+1=0
x=(a^2y+1)/(2a^y)
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