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The domain of the definition of the function f(x) = 2 x 4 1 − + log 10 (x 3 – x) is :

1. (1, 2) ∪ (2, ∞ )
2. (–2, –1) ∪ (–1, 0) ∪ (2, ∞ )
3. (–1, 0) ∪ (1, 2) ∪ (2, ∞ )
4. (–1, 0) ∪ (1, 2) ∪ (3, ∞ )

Correct answer: (–1, 0) ∪ (1, 2) ∪ (2, ∞ )

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