(17)3.5 x (17)? = 17 8

(17)^3.5 x (17)^? = 17⁸

Answer: Option D

Explanation:

Let (17)^3.5 x (17)^x = 17⁸.

Then, (17)^{3.5 + x} = 17⁸.

3.5 + x = 8

x = (8 - 3.5)

x = 4.5