Evaluate the exponential function f(x)=(1/2)^x. Which value completes this table?

x | -4 | -1 | 0 | 1 | 3 |
--------------------------------
f(x) | 16 | ? | 1 | 1/2 | 1/8 |


A. 12
B. 8
C. 4
D. 2

Respuesta :

0.5^-1=2
the answer is 2

Answer:

D. 2

Step-by-step explanation:

Replace values of x to evaluate the exponential function [tex]f(x)=(\frac{1}{2})^{x}[/tex]:

1. When x = -4

[tex]f(x)=(\frac{1}{2})^{-4}[/tex]

[tex]f(x)=16[/tex]

2. When x = 0

[tex]f(x)=(\frac{1}{2})^{0}[/tex]

[tex]f(x)=1[/tex]

3. When x = 1

[tex]f(x)=(\frac{1}{2})^{1}[/tex]

[tex]f(x)=\frac{1}{2}[/tex]

4. When x = 3

[tex]f(x)=(\frac{1}{2})^{3}[/tex]

[tex]f(x)=\frac{1}{8}[/tex]

5. When x = -1

[tex]f(x)=(\frac{1}{2})^{-1}[/tex]

[tex]f(x)=2[/tex]