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Mathematics
Problem
The series is written in sigma notation as
∑
k
=
2
9
(
3
+
5
(
k
−
2
)
)
\displaystyle \sum_{k=2}^{9} \bigl(3+5(k-2)\bigr)
k
=
2
∑
9
(
3
+
5
(
k
−
2
)
)
. Identify: (i) the first term, (ii) the common difference, (iii) the number of terms summed.
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