x² - 7x + 12 ≤ 0
(x - 3)(x - 4) ≤ 0
+ - +
_____[3]______[4]______
////////////////
x ∈ [3 ; 4]
Ответ : 3
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x² - 7x + 12 ≤ 0
(x - 3)(x - 4) ≤ 0
+ - +
_____[3]______[4]______
////////////////
x ∈ [3 ; 4]
Ответ : 3