Use Summation Notation
-$$\sum _ { i = 3 } ^ { 5 } \left( i ^ { 2 } - 8 \right)$$
A) 26
B) 15
C) 0
D) $- 12$

Question

Quizplus · Accepted Answer

The summation notation $\sum _ { i = 3 } ^ { 5 } \left( i ^ { 2 } - 8 \right)$ means to sum the expression $i^2 - 8$ for $i$ values from 3 to 5. Calculating each term: for $i=3$, $3^2 - 8 = 9 - 8 = 1$; for $i=4$, $4^2 - 8 = 16 - 8 = 8$; for $i=5$, $5^2 - 8 = 25 - 8 = 17$. Adding these together, $1 + 8 + 17 = 26$.

Use Summation Notation - ∑i=35(i2−8)\sum _ { i = 3 } ^ { 5 } \left( i ^ { 2 } - 8 \right)i=3∑5​(i2−8)

Use Summation Notation
- $\sum _ { i = 3 } ^ { 5 } \left( i ^ { 2 } - 8 \right)$