Question

Find f(-2) for f(x)=5*3^x.
A. -45
B. 5/9
C. 1/45
D. -30

Answer 1

So, f(-2) means that any x in the equation becomes -2.
So, the equation becomes 5×
`3^(-2)`.

`3^(-2)` is the same thing as
`(1)/(9)`.
So, multiply 5×
`(1)/(9)`, and you get
`(5)/(9)`.
So, your answer is B.
`(5)/(9)`