Question

Evaluate the summation of 2 n plus 5, from n equals 1 to 12
Will medal and/or fan!

Answer 1

Answer choices:
29
36
216
432

Answer 2

@Mehek14

Answer 3

@Qwertty123

Answer 4

@ganeshie8 @pooja195

Answer 5

@Atsie

Answer 6

\[\sum_{n=1}^{12} 2n+5 = 2 \sum_{n=1}^{12}n + \sum_{n=1}^{12}5 = 2 (\frac{12(12+1)}{2}) + 12(5) = 216\]

Answer 7

Thank you so much!! :)
So you basically just have to sum across?
I don't really get how to solve this

Answer 8

right you break it up into smaller summations
you just need the formula:
\[\sum_{i=1}^{N} i = \frac{N(N+1)}{2}\]

Answer 9

Oh okay, I'll write that equation down. I'm in virtual school and they don't teach these concepts well :/