Question

Find the inverse of g(x) = 2x^3 +3

Step by step working please I want to learn

Answer 1

Set g(x) as y. Then you get y = 2x^3 + 3. Switch Y with X and you get x = 2y^3 + 3. Now you can put everything with x getting, y = cuberoot[(x-3)/2]

Answer 2

`g(x)=2x^3+3\to y=2x^3+3`

replace x with y

`2y^3+3=x\ \ \ |-3\\\\2y^3=x-3\ \ \ |:2\\\\y^3=(x-3)/(2)\to y=\sqrt[3]{(x-3)/(2)}`

Answer:
`g^(-1)(x)=\sqrt[3]{(x-3)/(2)}`