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Mathematics for IGCSE & O level - Functions (Section 2 - No. 23)

If the range of f(x) is {1, 2, 3}, which set of values could be the domain of f^-1(x)?
{1, 2, 3}
{0, 1, 2, 3}
{a, b, c}
{-1, -2, -3}

説明

The range of f(x) becomes the domain of f^-1(x)

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