How Many Real Roots Does the Equation $x ^ { 5 } - 7 x + c = 0$

question 1

Multiple Choice

How many real roots does the equation $x ^ { 5 } - 7 x + c = 0$ have in the interval $[ - 1,1 ]$ ?

• A) at most five real roots
• B) no real roots
• C) at most one real root
• D) at most two real roots
• E) at most three real roots

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Definitions:

Nonresponse Bias

A bias in survey or research results occurred when individuals selected for participation do not respond, potentially leading to an unrepresentative sample.

Voluntary Response Bias

A bias in survey results that occurs when participants self-select to respond, leading to non-representative samples.

Undercoverage

A bias in statistics that occurs when some members of the population are inadequately represented in the sample.

Space Order

Refers to the organization or arrangement of elements in a visual field or a design project, emphasizing how objects are placed in three-dimensional space.