(19) Determine whether the following functions are injective, surjective, both, or neither. (a) f: RR defined by f(x) = eª. (b) g: Q→ R defined by g(x) = x³. (c) h: (0, ∞) → (0, 1] defined by h(x) = z²+1 (d) k: [0, ∞) → [7, ∞) defined by k(x) = x² + n.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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(19) Determine whether the following functions are injective, surjective, both, or neither.
(a) f: RR defined by f(x) = eª.
(b) g: Q→ R defined by g(x) = x³.
(c) h: (0, ∞) → (0, 1] defined by h(x) = z²+1
(d) k: [0, ∞) → [7, ∞) defined by k(x) = x² + n.
Transcribed Image Text:(19) Determine whether the following functions are injective, surjective, both, or neither. (a) f: RR defined by f(x) = eª. (b) g: Q→ R defined by g(x) = x³. (c) h: (0, ∞) → (0, 1] defined by h(x) = z²+1 (d) k: [0, ∞) → [7, ∞) defined by k(x) = x² + n.
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