An Arithmetic Sequence Has First Term $a = - 2$ And Common Difference

question 28

Essay

An arithmetic sequence has first term $a = - 2$ and common difference $d = 4$ .
How many terms of this sequence must be added to get $1566$ ?

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Definitions:

Dissociative Identity Disorder

A rare and complex psychological condition where an individual possesses two or more distinct identities or personality states, each with its own pattern of perceiving and interacting with the world.

Mutual Cognizance

Mutual cognizance refers to the shared awareness or understanding between individuals or entities.

Generalized Amnesia

A loss of memory for events that occurred over a limited period of time as well as for certain events that occurred prior to that period.

Dissociative Amnesias

A condition marked by sudden, temporary inability to remember important personal information, far beyond normal forgetfulness.