Question

Find f(-3) for f(x) = 4(2)^x.
ОА. 1/8
O B. -32
O C. -24
OD. 1/2

Answer 1

D

Explanation:

using the rule of exponents

`a^(-m)` =
`(1)/(a^(m) )`

substitute x = - 3 into f(x)

f(- 3) = 4(
`(2)^(-3)` = 4 ×
`(1)/(2^(3) )` = 4 ×
`(1)/(8)` =
`(1)/(2)`