Предмет: Алгебра, автор: Tatyankaootspovteror

найти область определения функции y=lg(X^2-4x)

Ответы

Автор ответа: nKrynka

Решение
x² - 4x > 0
x(x - 4) > 0
x(x - 4) = 0
x₁ = 0
x₂ = 4
+ - +
-///////////////------------////////////////->
- ∞ 0 4 +∞
x ∈ (- ∞; 0)∪(4; ∞)

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