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Find the inverse of the function f(x) = 2÷3x -6

1 Answer

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Answer:

f⁻¹(x) = 3/2x +9

Explanation:

You want the inverse of the function f(x) = 2/3x -6.

Inverse function

The inverse function can be found by solving for y:

x = f(y)

Here, that is ...

x = 2/3y -6

x +6 = 2/3y . . . . . . . . . . . . . . add 6

y = 3/2(x +6) = 3/2x +9 . . . . multiply by 3/2

The inverse function is f⁻¹(x) = 3/2x +9.

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Additional comment

Sometimes the division symbol ÷ is used to mean "divided by everything after this symbol." If that is the intended meaning, the function should be written as f(x) = 2/(3x -6) or f(x) = 2÷(3x -6).

We have interpreted the symbol according to the order of operations, which tells us that 2÷3x-6 means ((2÷3)·x)-6.

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