What is the inverse of the logarithmic function f(x) = log2x?

Set y = log₂(x), then rewrite the logarithmic equation in exponential form: x = 2ʸ. Switching x and y to find the inverse gives f⁻¹(x) = 2ˣ, so the correct choice is B, f⁻¹(x) = 2ˣ.

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