Task 4
Задача
Two segments are given on the number line: P = [34,64] and Q = [74, 94]. Choose a segment A such that the formula
(x ∈ A) → ( (x ∈ P) ⇔ (x ∈ Q) )
is identically true, that is, it takes the value 1 for any value of the variable
x. If there are several such segments, indicate the one that has a longer length.
1) [5, 33] ; 2) [25, 42] 3) [45, 71] 4) [65, 90]
Выберите правильный ответ, либо введите его в поле ввода
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