5-x/x-4 меньше или равно 0
(5-x)/(x-4)≤0 |*(x-4)²
x≠4
-(x-5)(x-4)≤0
x∈(-∞,4)u<5,∞)
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(5-x)/(x-4)≤0 |*(x-4)²
x≠4
-(x-5)(x-4)≤0
x∈(-∞,4)u<5,∞)