Question

4 square root of 9 1/2x

Answer 1

That's a tough problem to type out! Thanks for sharing this image of the original expression.

What I'd do would be to write:

(fourth root of 9)^(x/2) = [ (9)^(1/4) ]^(x/2) = 9^(x/8)

so the second of the four possible answer choices seems correct.