Hallo,
die charakt. Gleichung lautet:
k^2 +kp +q=0
k1/2= -k/2 ±√((k^2/4) -q)
----->
y(x) = C1 e^(-1/2 x (√(p^2 - 4 q) + p)) + C2 e^(1/2 x (√(p^2 - 4 q) - p))
------
1)C1 e^(-1/2 x (√(p2 - 4 q) + p)) =C1 e^(4x)
2)C2 e^(1/2 x (√(p^2 - 4 q) - p)) = C2 e^(3x)
-->Koeffizientenvergleich:
-----------------------------------------------------------
1) (-1/2 x (√(p2 - 4 q) + p)) = 4x
2) (1/2 x (√(p^2 - 4 q) - p)) = 3x
------------------------------------------------------------
1) (-1/2 (√(p2 - 4 q) + p)) = 4
2) (1/2 (√(p^2 - 4 q) - p)) = 3
----------------------------------------------------------
1) √(p^2 - 4 q) + p = -8
2) √(p^2 - 4 q) - p = 6
-----------------------------------------------------------
1-2) : 2p = -14 ->p= -7
------->q=12