(
)]
n
n
f
f
f
f
n
n
n
n
→∞
+
+
+
+
=
2
2
2
2
2
2
1
2
4
(2 – 2)
2 lim
[1
(
1)
(
1) 1 ]
n
n
n
n
n
n
→∞


+
+
+
+
+
+
+




=
2
2
2
-
1
1
2 lim
[(1 1 1)
(2
4 (2 – 2) ]
2
→∞
+ +
+
+
+
+
+
144244
3
n
n terms
n
n
n
=
2
2
2
2
1
2
2 lim
[
(1
2