9. Riccati equation. Nonlinear first order differential equation 2 y' + y? is the Riccati equation. a) Find values of parameter a, such that function y1 (x) = a/x is a solution of this equation. b) To find general solution of this equation, use substitution y = u(x)+2/x and show that function u(x) satisfies Bernoulli equation. c) Solve this Bernoulli equation and find general solution of the Riccati equation.

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9. Riccati equation. Nonlinear first order differential equation
2
y' + y*
x2
is the Riccati equation.
a) Find values of parameter a, such that function y1 (x) = a/x is a solution
of this equation.
b) To find general solution of this equation, use substitution y = u(x) +2/x
and show that function u(x) satisfies Bernoulli equation.
c) Solve this Bernoulli equation and find general solution of the Riccati
equation.
10. For autonomous equation
dy
y^(9 – y²)
dx
-
find critical points and phase portrait. Classify each critical point as asymp-
totically stable (sink or attractor), unstable (source or repeller) or semi-
stable (node). Sketch by hand typical solution curves in the regions of xy
plane.
Transcribed Image Text:9. Riccati equation. Nonlinear first order differential equation 2 y' + y* x2 is the Riccati equation. a) Find values of parameter a, such that function y1 (x) = a/x is a solution of this equation. b) To find general solution of this equation, use substitution y = u(x) +2/x and show that function u(x) satisfies Bernoulli equation. c) Solve this Bernoulli equation and find general solution of the Riccati equation. 10. For autonomous equation dy y^(9 – y²) dx - find critical points and phase portrait. Classify each critical point as asymp- totically stable (sink or attractor), unstable (source or repeller) or semi- stable (node). Sketch by hand typical solution curves in the regions of xy plane.
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