If X √ -LRB- 1 + y -RRB- + y √ -LRB- 1 + x -RRB- = 0 , then how can one show that dy/dx = -1 / -LRB- -LRB- 1 + x -RRB- ^ 2 -RRB- ? What is the proof ?
After answering or passing on all the questions sent to me , why does the little Answer icon still have a 1 on it ?