1. The problem statement, all variables and given/known data Find the solution of the following differential in the limit z -> i/2: 2. Relevant equations Quotient rule, product rule. 3. The attempt at a solution I found the first derivative using the quotient rule, with the answer as two fractions. I then took both fractions and differentiated them again, one of which required the quotient rule and the other of which required both the quotient rule and the product rule. However, every fraction in the final answer as a (z - i/2) term in the numerator and no similar terms in the denominator, which makes them all zero when you take the limit. My final answer is this: The answer should be -3i/16 after the limit is taken.