a) Jos a
0, niin x = C1e(1+
)t + C2e(1-
)t + 2/a2,
°y = C1 (1 +
)/a e(1+
)t + C2(1 -
)/a e(1-
)t - 1/a; °jos a = 0, niin
x = t + C1 , y = C2e2t; °b) jos a
0, niin x = C1ea2t + C2e-a2t + (a + 1)/(a(a2 + 1)) sin at,
y = -C1 ea2 t + C2e-a2t + (a - 1)/(a(a2 + 1)) cos at; °jos a = 0, niin x = t + C1, y = C2.