Initial conditions for stability

hbomb
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The general solution fo the following equations:

x'=2x-3y
y'=x-2y

Is, x=4C1e^2t, y=C1e^2t-3C2e^-2t

They ask for me to list a set of initial conditions (xo, yo) for which the solution is stable, i.e, (x, y)-->(0,0) for large t.

I don't understand this part of the problem.
 
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Basically, for what constants C1 and C2 do x and y go to infinity as t gets large? From that, solve for what x(0) and y(0) can be
 
Ok, I understand that for the general solution, the only unstable part of it is e^-2t. What does the setup of the solution look like?
 
Prove $$\int\limits_0^{\sqrt2/4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx = \frac{\pi^2}{8}.$$ Let $$I = \int\limits_0^{\sqrt 2 / 4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx. \tag{1}$$ The representation integral of ##\arcsin## is $$\arcsin u = \int\limits_{0}^{1} \frac{\mathrm dt}{\sqrt{1-t^2}}, \qquad 0 \leqslant u \leqslant 1.$$ Plugging identity above into ##(1)## with ##u...
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