the following EDO:
dx/dt= x4 −µx2
where µ is a parameter in R.
(i) Identify the critical value fµC or which a bifurcation occurs. Give the equilibrium points for µ <µC and µ> µC, say if each of these is stable or unstable, and plot the phase lines for these two cases.
(ii) Draw the bifurcation diagram indicating in dotted line the unstable equilibrium points and in solid line the stable equilibrium points.
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