Without Expanding Completely, Find the Middle Term in the Expansion

question 4

Multiple Choice

Without expanding completely, find the middle term in the expansion of the expression.

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Definitions:

Endoderm

In early embryonic development, the most internal cell or tissue layer that evolves into the lining of the digestive and respiratory systems.

Metencephalon

Second most posterior division of the embryonic brain; becomes the pons and cerebellum in the adult.

Cerebellum

A major structure of the hindbrain that controls fine motor skills, balance, and coordination.

Myelencephalon

The myelencephalon is a part of the brainstem, primarily responsible for controlling vital functions such as breathing, heart rate, and digestion.