AIR MATH

Math Question

Which two functions are inverses of each other?
\( f^{\top}(x)=x, g(x)=-x \)
\( f(x)=2 x, g(x)=-\frac{1}{2} x \)
\( f(x)=4 x, g(x)=\frac{1}{4} x \)
\( f(x)=-8 x, g(x)=8 x \)

Solution

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