=
I
4
[
2
(
2
R
+
R
V
)
+
R
]
=
I
4
(
5
R
+
2
R
V
)
=
I
4
[
2
(
2
R
+
R
V
)
+
R
]
=
I
4
(
5
R
+
2
R
V
)
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