% We are trying to find A that satisfies y(1) = 2
tspan = [0:.1:1];

beta = 2;

% Define an initial A, try A = 1, then try A = 2, then A = 5 
A = 1;

alpha = -1;
y0 = [alpha A];
[t,y] = ode45('f',tspan,y0);

figure(1), plot(t,y(:,1),'r*-',tspan(1),alpha,'bs',tspan(end),beta, 'bo') % plot solution y 
set(gca,'FontSize',20)