Question

Let f(x) = 3^x-2. Find f(4) ?

Evaluation Exponential Functions

Answer 1

`9`... or `79`.

Explanation:

Should have written the question more clearly. Since we are replacing `x` with `4` as seen from `f(4)`, we can simply plug `4` into `3^x-2` to be `3^4-2`. This would be equal to `79`.

However, if the equation were written like this, which could be more likely:

`3^(x-2)`

your answer would be `9`, as the exponent would just be `2`, since you are simply taking away `2` from `4`.