Wyznacz dziedzinę funkcji:
Dziedzina:
x³-7x²-2x+14 ≠ 0
x²(x-7)-2(x-7)≠0
(x²-2)(x-7) ≠ 0
(x-√2)(x+√2)(x-7)≠0
x≠ √2 ∨ x≠-√2 ∨ x ≠7
x∈R\{-√2;√2;7}
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Dziedzina:
x³-7x²-2x+14 ≠ 0
x²(x-7)-2(x-7)≠0
(x²-2)(x-7) ≠ 0
(x-√2)(x+√2)(x-7)≠0
x≠ √2 ∨ x≠-√2 ∨ x ≠7
x∈R\{-√2;√2;7}