Write the sum without sigma notation and evaluate it.
-$$\sum _ { k = 1 } ^ { 3 } 5 ^k { \cos k \pi }$$
A) $5 \cos \pi + 25 \cos 2 \pi + 125 \cos 3 \pi = 105$
B) $5 \cos \pi + 25 \cos \pi + 125 \cos \pi = - 155$
C) $5 \cos \pi + 25 \cos 2 \pi + 125 \cos 3 \pi = - 105$
D) $5 \cos \pi + 125 \cos 3 \pi = - 130$

Question

Write the sum without sigma notation and evaluate it.
-$$\sum _ { k = 1 } ^ { 3 } 5 ^k  { \cos k \pi }$$
A) $5 \cos \pi + 25 \cos 2 \pi + 125 \cos 3 \pi = 105$
B) $5 \cos \pi + 25 \cos \pi + 125 \cos \pi = - 155$
C) $5 \cos \pi + 25 \cos 2 \pi + 125 \cos 3 \pi = - 105$
D) $5 \cos \pi + 125 \cos 3 \pi = - 130$

Quizplus · Accepted Answer

The Answer of Write the sum without sigma notation and evaluate it.
-$$\sum _ { k = 1 } ^ { 3 } 5 ^k  { \cos k \pi }$$
A) $5 \cos \pi + 25 \cos 2 \pi + 125 \cos 3 \pi = 105$
B) $5 \cos \pi + 25 \cos \pi + 125 \cos \pi = - 155$
C) $5 \cos \pi + 25 \cos 2 \pi + 125 \cos 3 \pi = - 105$
D) $5 \cos \pi + 125 \cos 3 \pi = - 130$

Write the Sum Without Sigma Notation and Evaluate It ∑k=135kcos⁡kπ\sum _ { k = 1 } ^ { 3 } 5 ^k { \cos k \pi }k=1∑3​5kcoskπ

Write the Sum Without Sigma Notation and Evaluate It $\sum _ { k = 1 } ^ { 3 } 5 ^k { \cos k \pi }$