18-02-2022
Mathematics

contestada

Which function has an inverse that is also a function?
g(x) = 2x - 3
k(x) = -9x2
f(x) = 5x + 21
(x) = -20

Respuesta :

Medunno13 Medunno13

18-02-2022

Answer: 1st, 3rd, and 4th functions

Step-by-step explanation:

Assuming k(x)=9x^2, all the other functions have inverses because they are linear, meaning they must be one-to-one.

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