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in Differential equations by (64.8k points)

Find the domain of f(x) = √(4 – [x]).

1 Answer

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Best answer

We have 4 – [x] ≥ 0 

⇒ [x]  4

⇒ x < 4 + 1 = 5

 x ∈ (– , 5)

Thus, Df = (–, 5)

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