Evaluate the Sum $$\sum _ { k = 2 } ^ { 9 } 4 k$$

question 215

Multiple Choice

Evaluate the sum. $$\sum _ { k = 2 } ^ { 9 } 4 k$$

• A) 2
• B) 176
• C) 352
• D) 9
• E) none of these

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Definitions:

ECG

An abbreviation for Electrocardiogram, a test that measures the electrical activity of the heart to show whether it is working normally.

Electrodes

Conductive materials that can be used to detect electrical signals or deliver electrical stimulation in various applications.

Isoelectric Line

The baseline of the electrocardiogram (ECG) where no electrical activity is recorded, representing the period between heartbeats.

Deflection

The change in direction of a wave or object due to a change in its speed, typically as a result of entering a different medium.