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Xrom1356
@Xrom1356
September 2021
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Пожалуйста срочно надо
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Universalka
Verified answer
A) любые значения x
б) x - 3 ≠ 0
x ≠ 3
Область определения x ∈ ( - ∞, 3) ∪ (3 , + ∞)
в) - x² - 4x + 5 ≥ 0
x² + 4x - 5 ≤ 0
(x + 5)(x - 1) ≤ 0
_____________________
+ - 5 - 1 +
Область определения x ∈ [ - 5 ; 1]
г) x² - 9 > 0
(x - 3)(x + 3) > 0
___________________________
+ - 3 - 3 +
Область определения x ∈ ( - ∞ ; - 3) ∈ (3 ; + ∞)
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Answers & Comments
Verified answer
A) любые значения xб) x - 3 ≠ 0
x ≠ 3
Область определения x ∈ ( - ∞, 3) ∪ (3 , + ∞)
в) - x² - 4x + 5 ≥ 0
x² + 4x - 5 ≤ 0
(x + 5)(x - 1) ≤ 0
_____________________
+ - 5 - 1 +
Область определения x ∈ [ - 5 ; 1]
г) x² - 9 > 0
(x - 3)(x + 3) > 0
___________________________
+ - 3 - 3 +
Область определения x ∈ ( - ∞ ; - 3) ∈ (3 ; + ∞)