6.2. (5 points) What is xxx in the following equation? (Assume the left-hand-side term of the equation converges.)
∑r=2∞2x−r=1+3×2x−2\sum_{r=2}^{\infty} 2^{x-r} = \sqrt{1+3\times 2^{x-2}}∑r=2∞2x−r=1+3×2x−2
You need to show how to obtain your answer.
