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OpenStudy (anonymous):
Write 3 + 5 + 7 + 9 + 11 + 13 + 15 in sigma notation.
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Parth (parthkohli):
\[= [2(1) + 1] + [2(2) + 1] \cdots [2(7) + 1] \]
OpenStudy (anonymous):
\[\sum_{n=1}^{7} 2n + 1\]
OpenStudy (anonymous):
okay
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