Respuestas
a
los problemas
Ejercicios 4.7, Página 171
1.
(4D - 3)(4D + 3)
2. (D
-
8)( D
-
3)
3. D(D
+
6)2
4. (D
+
I )(D
-
2)(D
-
4)
5. D(D
+
4)( D 2
-
4D
+
16)
6. (D
2
+
7)2
7. D
3
9.
D(D
-
4)
10 . D
2
(D
-
10)2
11.
D
3
(D
2
+
81)
12 . D 2(D 2
+
4)(D 2
+
49)
13. (D
+
1)(D
-
1)3
14 . D(D 2
-
6D
+
25 )
15. (D 2
+
4D
+
13)(D 2
-
12D
+
45 )
17. Y=(Cl +c2x)ex+ 4 cosx- 5 sen x
18.
y
=
(Cl eos
4x
+
e2 sen
4x )e X
-
1
+
4x
+
17x 2
19. y
=
Cl
+
C2e - 8x
-
x
+
4x 2
20. y
=
(el
+
c2x)e-2x
+
4x 2e- 2x
21.
y
=
ele-
3x
+
e2e-x
-
2xe- 3x
+
6x
-
3
22 . Y
=
(Cl
+
e2x )e-5x
+
(x 2
+
x 3 )e- 5X
7
23. Y
=
Cl
+
C2e-3x
+
3x
-
(x
+
6x 2 )e - 3x
24 . y
=
cle- 3x
+
C2e-2x
+
(20x
-
5x 2 )e- 2x
23 1
1...,223,224,225,226,227,228,229,230,231,232 234,235,236,237,238,239,240,241,242,243,...252