When you make a substitution, we require to get the new integration limits.
Since you made plug to get integration limits for
Ok I've been having a bit of trouble on a homework question and I was just wondering if I am even going about this the right way.
Find the Arclength of y = 1/x from x=1 to x=2.
So I got the following integral:
Then I did:
So I get:
And after that I used integration by parts to get:
And this is where I hit a wall. I don't know how to solve that last integral. And I might be going about this the entirely wrong way.