anonymous 3 years ago Write 3 + 5 + 7 + 9 + 11 + 13 + 15 in sigma notation.

1. ParthKohli

$= [2(1) + 1] + [2(2) + 1] \cdots [2(7) + 1]$

2. anonymous

$\sum_{n=1}^{7} 2n + 1$

3. anonymous

okay