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March 26, 2017

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Verify that the functions f and g, are inverses of each other by showing that
f(g(x))=x and g(f(x))=x.

f(x)=4-x^3
g(x)=^3ã4-x

  • Precalculus - ,

    just plug in the values for f and g

    f(g) = 4 - g^3 = 4 - cbrt(4-x)^3 = 4 - (4-x) = x

    g(f) = cbrt(4-f) = cbrt(4 - (4-x^3)) = cbrt(4-4+x^3) = cbrt(x^3) = x

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