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(1)
y= ln(x-1) +√(4-x^2)+ 1/(x-2)
x-1>0 and 4-x^2≥0 and x-2≠0
x>1 and -2≤x≤2 and x≠2
1<x<2
定义域=(1,2)
(2)
y = ( e^x -1)/(e^x +1)
=1 -2/(e^x +1)
2/(e^x +1) = 1 -y
1/(e^x +1) = (1 -y)/2
e^x +1 = 2/(1-y)
e^x = (1+y)/(1-y)
x=ln[(1+y)/(1-y)]
反函数
y=ln[(1+x)/(1-x)]
y= ln(x-1) +√(4-x^2)+ 1/(x-2)
x-1>0 and 4-x^2≥0 and x-2≠0
x>1 and -2≤x≤2 and x≠2
1<x<2
定义域=(1,2)
(2)
y = ( e^x -1)/(e^x +1)
=1 -2/(e^x +1)
2/(e^x +1) = 1 -y
1/(e^x +1) = (1 -y)/2
e^x +1 = 2/(1-y)
e^x = (1+y)/(1-y)
x=ln[(1+y)/(1-y)]
反函数
y=ln[(1+x)/(1-x)]
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