Find All Values Of $X$ Such That $f ( x ) > 0$

question 13

Multiple Choice

Find all values of $X$ such that $f ( x ) > 0$ $f ( x ) = x ^ { 4 } - 16 x ^ { 2 }$

• A) \(( - \infty , 4 ) \cup ( 4 , \infty )\)
• B) \(( - \infty , - 4 ] \cup [ 4 , \infty )\)
• C) \(( - 4,4 )\)
• D) \(( - \infty , 4 ) \cup ( - 4 , \infty )\)
• E) \(( - \infty , - 4 ) \cup ( 4 , \infty )\)

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Definitions:

Iodobutane

An organic compound with the formula C4H9I, characterized as a butane molecule where one hydrogen atom has been replaced by an iodine atom.

Methanol

Methanol, a straightforward alcohol bearing the formula CH3OH, serves multiple purposes such as a solvent, antifreeze, fuel, and a foundational material for producing other chemicals.

E1 Reactions

A type of unimolecular nucleophilic substitution reaction where the rate-determining step involves the loss of a leaving group to form a carbocation intermediate.

Alkyl Halides

Organic compounds containing a halogen atom (chlorine, bromine, fluorine, or iodine) bonded to an alkyl group.