Question

Evaluate the following function at f(15)Type the numerical value for the answer

Answer 1

To evaluate a function, you can substitute x with the value given. So, to evaluate f(15) of the function

$f(x)=4(-2)^{\frac{x}{5}}$

We do:

$f(15)=4(-2)^{\frac{15}{5}}=4(-2)^3=4(-8)=-32$

Then:

$f(15)=-32$

To evaluate f(24) we do the same:

$f(24)=4(-2)^{\frac{24}{5}}$

The problem here is that 24/5 isn't an integer. So we can stop here.