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fly36
@fly36
August 2022
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помогите!!! (0,7)^х2-4х+2>=0,49
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ShirokovP
Verified answer
(0.7)^(x^2 - 4x + 2) ≥ (0.7)^2
Так как 0 < 0.7 < 1 то знак меняем на противоположный
x^2 - 4x + 2 ≤ 2
x^2 - 4x ≤ 0
x (x - 4) ≤ 0
+ - +
---------- 0 -------------- 4 -------------> x
x ∈ [ 0; 4]
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Verified answer
(0.7)^(x^2 - 4x + 2) ≥ (0.7)^2Так как 0 < 0.7 < 1 то знак меняем на противоположный
x^2 - 4x + 2 ≤ 2
x^2 - 4x ≤ 0
x (x - 4) ≤ 0
+ - +
---------- 0 -------------- 4 -------------> x
x ∈ [ 0; 4]