y = log(x - 2) (10 - x)
по определению логарифма log (a) b a > 0 a ≠ 1 b > 0
x - 2 > 0
x - 2 ≠ 1
10 - x > 0
-----
x > 2
x ≠ 3
x < 10
----
x ∈ (2, 3) U (3, 10)
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y = log(x - 2) (10 - x)
по определению логарифма log (a) b a > 0 a ≠ 1 b > 0
x - 2 > 0
x - 2 ≠ 1
10 - x > 0
-----
x > 2
x ≠ 3
x < 10
----
x ∈ (2, 3) U (3, 10)