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23 votes
23 votes
PLEASE HELP I DONT HAVE MUCH TIME

If f(x) = 4^x, then f(-3) equals
1/64
64
-64
-12

User Ben Barkay
by
3.0k points

2 Answers

10 votes
10 votes

Answer: 1/64

Step-by-step explanation: it wants you to have 4^-3

User Natashia
by
2.6k points
22 votes
22 votes

Answer: Choice A. 1/64

Work Shown:

f(x) = 4^x

f(-3) = 4^(-3)

f(-3) = 1/(4^3) ... see note below

f(-3) = 1/64

Note: I'm using the rule that a^(-b) = 1/(a^b)

User Marc Cohen
by
3.4k points