In: Advanced Math
5. Equations of the form y’ = P(x)*y^2 + Q(x)*y + R(x) are called Riccati equations.
i) If we know a solution y = φ(x) of this equation, then any other solution
can be written in the form y(x) = φ(x)+ 1/v(x), where v(x) is an unknown
function which satisfies a certain linear equation. Using the fact that
φ and y both solve the above Riccati equation, find the differential
equation that v satisfies.
ii) Consider the equation 3y’ + y^2 +2/(x^2) = 0. Find one solution of this equation by inspection.
iii) Use the method of part(i) to find the general solution of the equation
in (ii).