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Mathematics, 19.02.2020 20:03 tannersclark

Which function has an inverse that is also a function?
{(-1, -2), (0, 4), (1, 3), (5, 1), (7,4)}
{(-1,2), (0, 4), (1,5), (5, 4), (7, 2)}
{1,3), (0, 4), (1, 14), (5, 6), (7, 2)}
{(-1,4), (0, 4), (1, 2), (5,3), (7, 1);

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Which function has an inverse that is also a function?
{(-1, -2), (0, 4), (1, 3), (5, 1), (7,4...
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