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For an invertible f, what does (f⁻¹ o f)(x) equal?
Af(x)
Bx
C1/f(x)
Df⁻¹(x)
Answer & Solution
Correct answer: B. x
Applying f then f⁻¹ returns the original input, so (f⁻¹ o f)(x) = x.
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