Let f : [0,∞) → [0,∞) be defined by, f(x) := √ x for all x ∈ [0,∞), g : [0,∞) → R be defined by, g(x) := √ x for all x ∈ [0,∞) and h : [0,∞) → [0,∞) be defined by h(x) := x 2 for each x ∈ [0,∞). For each of the following (i) state whether the function is defined - if it is then; (ii) state its domain; (iii) state its codomain; (iv) state the natural domain for the formula.
(a) f ◦ g
(b) g ◦ f
(c) h ◦ f
(d) f ◦ h.
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