Van de Pols equation is a nonlinear model for some oscillato
     Van de Pol\'s equation is a nonlinear model for some oscillatory processes. It is:  y-b(1- y^2)y + y = 0  Use Simulink to solve for and plot the solution for:  b = 0.1  y(0) = y(0) = 1  0 lessthanorequalto t lessthanorequalto 25 
  
  Solution
y\"-b(1-y^2)y\'+y=0
=-b(0-2y\')+0
=0
the equation will be y\"+y=0

