Question

evaluate

Answer 1

\[\sum_{n=1}^{k} n=\frac{k(k+1)}{2} \\ \sum_{n=1}^{k} c=k \cdot c\]

Answer 2

how do i fill that in though?

Answer 3

your k is 14

Answer 4

\[\sum_{n=1}^{14}(3n+2) \\ \sum_{n=1}^{14} (3n)+\sum_{n=1}^{14} 2 \\ 3 \sum_{n=1}^{14} n +\sum_{n=1}^{14} 2\]