Limites.
lim
x
→
0
1
+
x
-
1
x
=
lim
x
→
0
1
+
x
-
1
x
·
1
+
x
+
1
1
+
x
+
1
=
lim
x
→
0
1
+
x
-
1
x
1
+
x
+
1
lim
x
→
0
1
+
x
-
1
x
=
lim
x
→
0
1
+
x
-
1
x
·
1
+
x
+
1
1
+
x
+
1
=
lim
x
→
0
1
+
x
-
1
x
1
+
x
+
1
(1)
lim
x
→
0
=
x
x
1
+
x
+
1
=
lim
x
→
0
1
1
+
x
+
1
=
1
1
+
0
+
1
=
1
2
lim
x
→
0
=
x
x
1
+
x
+
1
=
lim
x
→
0
1
1
+
x
+
1
=
1
1
+
0
+
1
=
1
2
(2)