Evaluate the sum using the given information.
-$$\begin{array} { l }
\mathrm { x } _ { 1 } = - 4 , \mathrm { x } _ { 2 } = 4 , \mathrm { x } _ { 3 } = - 1 , \mathrm { x } _ { 4 } = - 2 , \text { and } \Delta \mathrm { x } = 0.7 ; \mathrm { f } ( \mathrm { x } ) = \frac { \mathrm { x } } { \mathrm { x } - 5 } \
\sum _ { \mathrm { i } = 1 } ^ { 4 } \mathrm { f } \left( \mathrm { x } _ { \mathrm { i } } \right) \Delta \mathrm { x } \text { (Round to the nearest tenth, if necessary.) }
\end{array}$$
A) -1
B) -2.4
C) -2.2
D) 3.4

Question

Evaluate the sum using the given information.
-$$\begin{array} { l } 
\mathrm { x } _ { 1 } = - 4 , \mathrm { x } _ { 2 } = 4 , \mathrm { x } _ { 3 } = - 1 , \mathrm { x } _ { 4 } = - 2 , \text { and } \Delta \mathrm { x } = 0.7 ; \mathrm { f } ( \mathrm { x } ) = \frac { \mathrm { x } } { \mathrm { x } - 5 } \
\sum _ { \mathrm { i } = 1 } ^ { 4 } \mathrm { f } \left( \mathrm { x } _ { \mathrm { i } } \right) \Delta \mathrm { x } \text { (Round to the nearest tenth, if necessary.) }
\end{array}$$
A) -1
B) -2.4
C) -2.2
D) 3.4

Quizplus · Accepted Answer

Calculate each term: f(x1) = -4/-9, f(x2) = 4/-1, f(x3) = -1/-6, f(x4) = -2/-7. Multiply each by Δx = 0.7 and sum them: (-4/9)*0.7 + (-4)*0.7 + (1/6)*0.7 + (2/7)*0.7 ≈ -2.2.

Evaluate the Sum Using the Given Information A) -1 B) -2

Evaluate the Sum Using the Given Information A) -1
B) -2