Oops! I just discovered that the plus sign on my numeric pad prints out an equal sign. Weird.
I'll try again:http:
f(x) = ((x-1)/(x+1))^1/2
f'(x) = ((x-1)/(x+1))^-1/2)/(x+1)^2 (my answer, which I think is correct but can't get it in the form given in the book).
Answer in Schaum's: f'(x) = I/(x+1)(x^2-1)^1/2
Your second example, but with x+1 in the denominator, is what I intended.
I'm new to the forum but can't find out how to format with the actual radical sign as you have.