Find the Critical Number(s), If Any, of the Function $f ( x ) = x ^ { 3 } - 21 x + 4$

question 58

Multiple Choice

Find the critical number(s) , if any, of the function $f ( x ) = x ^ { 3 } - 21 x + 4$ .

• A) 4
• B) \(- 4\)
• C) \(\pm \sqrt { 7 }\)
• D) \(\pm 7\)

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Definitions:

Recently Classified

A term referring to something that has been newly categorized or identified within a scientific or systematic classification.

Ionotropic Receptor

Embedded membrane protein; acts as (1) a binding site for a neurotransmitter and (2) a pore that regulates ion flow to directly and rapidly change membrane voltage.

Neuronal Membrane

The lipid bilayer that encloses the cytoplasm of a neuron, crucial for maintaining the electrical potential and facilitating signal transmission.