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Given: f(x)9x+5, find f^-1(x) then state whether f^-1(x) is a function.
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Given: f(x)9x+5, find f^-1(x) then state whether f^-1(x) is a function.

User Rweisse
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f(x) = 9x + 5
y = 9x + 5
9x = y - 5
x = (y - 5)/9
f^-1(x) = (x - 5)/9

f^-1(x) is a function.
User Wizurd
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