Question 1147898
f(x) = 1 + (x-2)^(1/2)
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let f(x) = y
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y = 1 + (x-2)^(1/2)
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interchange the x's and y's
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x = 1 + (y-2)^(1/2)
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solve for y
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(x-1) = (y-2)^(1/2)
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square both sides of =
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(x-1)^2 = y -2
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y = (x-1)^2 +2
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substitute f^-1 (x) for y
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f^(-1) (x) = (x-1)^2 +2  for x > or = 2
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