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Mathematics
Problem
Rewrite the series
5
+
10
+
20
+
40
+
80
+
160
+
320
+
640
5 + 10 + 20 + 40 + 80 + 160 + 320 + 640
5
+
10
+
20
+
40
+
80
+
160
+
320
+
640
in sigma notation such that the index of summation begins at
k
=
2
k = 2
k
=
2
.
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