Find the Sum of the First 12 Terms of the Arithmetic

question 39

Short Answer

Find the sum of the first 12 terms of the arithmetic sequence:
28,22,16,10, ....

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Definitions:

Depersonalization/Derealization Disorder

A mental disorder characterized by experiencing a feeling of being detached from one's own body or thoughts (depersonalization) and a sense of unreality about the external world (derealization).

PET Scan Activity

A measure of metabolic activity within the brain or other parts of the body using Positron Emission Tomography, which can help in diagnosing diseases and understanding brain functions.

Brain Wave Activity

The patterns of neural oscillations in the brain, detectable with electroencephalography (EEG), linked to different states of consciousness.

Dissociative Fugue

A psychological state in which a person loses awareness of their identity or other important autobiographical information and often involves unexpected travel away from home.