11 Which of the following differential equations has y = c1 ex + c2 e–x as the general
solution (A)
2
2
0
d y
y
dx
+
=
(B)
2
2
0
d y
y
dx
−
=
(C)
2
2
1
0
d y
dx
+ =
(D)
2
2
1
0
d y
dx
− =
12 Which of the following differential equations has y = x as one of its particular
solution