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Suppose f(x) = 2^-x +1. Find a such that f(a) = 3.
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4 votes
Suppose f(x) = 2^-x +1. Find a such that f(a) = 3.

User Xaver Kapeller
by
4.9k points

1 Answer

5 votes

Answer:

a = -1

Explanation:

let
2^(-x)+1 be 3

solve for x:


2^(-x)+1=3\\2^(-x)=2\\-x=log2(2)\\-x=1\\x=-1

User MeltingDog
by
4.9k points
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