Question

Could someone go over the algebra involved in the solution of problem 3A-1e (http://goo.gl/SRrfb). The problem is at this URL (http://goo.gl/EQxnc).

Answer 1

The parts which escape me are \[1/2\sqrt{x}dx/1/2\sqrt{y}=\sqrt{y}dx/\sqrt{x}\] and how \[\sqrt{y}dx/\sqrt{x}\] becomes \[1-\sqrt{x}/\sqrt{x}\]

Answer 2

which question?