Question

Find the surface area.... (please see photo)

Answer 1

Please solve this for me. I just wanted to check if my work is right. I solved it two ways, but I don't know which is right.

Answer 2

Also, do I translate the inequality this way: \[x \ge 1 \rightarrow \int\limits_{1}^{\infty} \] or this way? : \[x \ge 1 \rightarrow \int\limits_{x-1}^{\infty}\]

Answer 3

I figured-out the inequality. I use \[\int\limits_{1}^{\infty}\]