20 Chapter 1, section 1.2. Riccati Equation. subsection 1.2.8-2. Equations containing arbitrary functions and their derivatives.

20.1 problem 34
20.2 problem 35
20.3 problem 36
20.4 problem 37
20.5 problem 38
20.6 problem 39
20.7 problem 40
20.8 problem 41
20.9 problem 42