Mathematics, 18.02.2022 21:20, countrygirlbookworm2

Which function has an inverse that is also a function? g(x) = 2x-3
k(x) = -9x2
f(x) = x + 21
w(x) = -20

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Which function has an inverse that is also a function? g(x) = 2x-3
k(x) = -9x2
f(x) =...