Answer:
I think it is 4 (correct me if I'm wrong)
Explanation:
the answer is 4 because the the f(1)
this means that the (x) is replaced by f(1)
then you see the 4^{x} is replaced by 4^{1}
4^{1} = 4
4
Any base raised to the power of 1 is that base.
f(x) = 4^x
f(1) = 4^1 = 4
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