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lilyagrigoryan
@lilyagrigoryan
August 2022
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Для каждого неравенства укажите множество его решений
А) Х^2 -49>0 1) (-&; +&)
В) Х^2+49>0 2) (-7;7)
C)X^2- 49<0 3)(-&;-7)U(7;+&)
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KarinaYouchi
А-3
x^2-49>0
x^2>49
x1=7
x2=-7
+ - +
/////////////////////// /////////////////////////////
-------------------(-7)-----------------------------(7)------------------------
(-∞;-7)U(7;+∞)
C-2
x^2-49<0
x^2<49
x1=7
x2=-7
+ - +
/////////////////////////////////
----------------(-7)-------------------------(7)---------------------------
(-7;+7)
Соответственно, В-1
1 votes
Thanks 2
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Answers & Comments
x^2-49>0
x^2>49
x1=7
x2=-7
+ - +
/////////////////////// /////////////////////////////
-------------------(-7)-----------------------------(7)------------------------
(-∞;-7)U(7;+∞)
C-2
x^2-49<0
x^2<49
x1=7
x2=-7
+ - +
/////////////////////////////////
----------------(-7)-------------------------(7)---------------------------
(-7;+7)
Соответственно, В-1