How do I justify if these functions are inverses of each other ... F (x) = x^3 + 4 & g (x) = 3 (radical sign) - 4

Question

Mathematics

Eli Kelly

21 February, 17:05

How do I justify if these functions are inverses of each other ... F (x) = x^3 + 4 & g (x) = 3 (radical sign) - 4

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Jean Vang · Answer 1

You plug them into each other for x like so:

(3 (radical sign) - 4) ^3+4

-4+4

You're left with x

Then do the same for the other one

3 (radical sign) (x^3+4) - 4

X+4-4

Left with x again there fore it is an inverse