Image of Element under Mapping/Examples/Image of 2 under x^4-1
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Example of Image of Element under Mapping
Let $f: \R \to \R$ be the mapping defined as:
- $\forall x \in \R: \map f x = x^4 - 1$
The image of $2$ is:
- $\map f 2 = 15$
Proof
- $2^4 - 1 = 16 - 1 = 15$
$\blacksquare$
Sources
- 1978: Thomas A. Whitelaw: An Introduction to Abstract Algebra ... (previous) ... (next): Chapter $4$: Mappings: Exercise $3 \ \text {(i)}$