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

question 188

Multiple Choice

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) \(5 \cos \pi + 125 \cos 3 \pi = - 130\)

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Definitions:

Negotiable Instruments

Financial documents that are transferable from one person to another, designed to guarantee the payment of a specific amount of money either on demand or at a set time.

Special Rules

Specific regulations or guidelines designed to address particular scenarios or areas within a broader regulatory framework.

Acceleration

A provision in a contract that allows a lender to demand immediate payment of the entire outstanding balance if certain conditions are not met.

Payment

The transfer of money or its equivalent in exchange for goods, services, or to settle a debt.