Question

Find f(-2) for f(x)=2(4)^x

Answer 1

Answer:1/8

Step-by-step explanation:

Answer 2

For this case we have the following exponential function:
 $f (x) = 2 (4) ^ x$
 To find the value of f (-2) what we must do is substitute the value of x = -2 in the given function.
 We have then:
 $f (x) = 2 (4) ^{-2}$
 Then, rewriting the function we have:
 $f (x) = \frac{2}{4^2}$
 $f (x) = \frac{2}{16}$
 Finally, simplifying we have:
 $f (x) = \frac{1}{8}$
 Answer:
 The value of f (-2) is:
 $f (x) = \frac{1}{8}$
 option B