Question

When f(x)=-3(2)^-× what is the value of f(-3)

Answer 1

Let the function be,

`f(x)=3*2^(-x)`

Put -3 for x in the function to find f(-3) implies,

`\begin{gathered} f(-3)=3*2^(-(-3)) \\ =3*2^3 \\ =3*8 \\ =24 \end{gathered}`

Thus, f(-3) is 24.