Use a graphing calculator to evaluate the series.
-$$\sum _ { \mathrm { k } = 2 } ^ { 7 } \left( \mathrm { k } ^ { 2 } - 4 \mathrm { k } + 7 \right)$$
A) 273
B) 189
C) 73
D) $- 11$

Question

Quizplus · Accepted Answer

The series sums the values of $k^2 - 4k + 7$ for $k$ from 2 to 7. Calculating each term individually or using a graphing calculator to evaluate the series directly, we find the sum to be 73.

Use a Graphing Calculator to Evaluate the Series ∑k=27(k2−4k+7)\sum _ { \mathrm { k } = 2 } ^ { 7 } \left( \mathrm { k } ^ { 2 } - 4 \mathrm { k } + 7 \right)k=2∑7​(k2−4k+7)

Use a Graphing Calculator to Evaluate the Series $\sum _ { \mathrm { k } = 2 } ^ { 7 } \left( \mathrm { k } ^ { 2 } - 4 \mathrm { k } + 7 \right)$