Express the Sum Using Summation Notation

question 18

Multiple Choice

Express the sum using summation notation.
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Definitions:

Sleep

Periodic, natural loss of consciousness—as distinct from unconsciousness resulting from a coma, general anesthesia, or hibernation.

Dopamine

A neurotransmitter in the brain essential for the reward system, motivation, pleasure, and motor function.

ACh

Short for Acetylcholine, a neurotransmitter in both the central and peripheral nervous systems that plays key roles in the function of muscles, learning, and memory.

Pituitary Gland

A small endocrine gland in the brain involved in regulating vital body functions and general wellbeing, through the secretion of hormones.