Find the indicated partial sum for the sequence with the given general term
-$\mathrm{s}_{5}, \mathrm{a}_{\mathrm{n}}=-4 \mathrm{n}+9$
A) 5
B) -15
C) -11
D) 25

Question

Quizplus · Accepted Answer

The partial sum $s_5$ of the sequence can be found by adding the first five terms of the sequence. Given $a_n = -4n + 9$, we find each term as follows: $a_1 = -4(1) + 9 = 5$, $a_2 = -4(2) + 9 = 1$, $a_3 = -4(3) + 9 = -3$, $a_4 = -4(4) + 9 = -7$, and $a_5 = -4(5) + 9 = -11$. Adding these together, $5 + 1 - 3 - 7 - 11 = -15$.

Find the Indicated Partial Sum for the Sequence with the Given