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sopovakaterina
@sopovakaterina
November 2021
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определить знак произведения,если х>0
1) (х+1)*(х+3)
2) (-х-1)*(х+2)
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TARTILLO
Verified answer
Определить знак произведения,если х>01) (х+1)*(х+3)
( знаки :"+", "-" - это знаки выражения(х+1)*(х+3) )
+ - +
------------( - 3)-------------------( -1)-------------------------------------
I-------------------------------
0
Т.О (х+1)*(х+3)>0 при
х>0
2) (-х-1)*(х+2)
- + -
------------( - 2)-------------------( -1)-------------------------------------
I-------------------------------
0
Т.О (-х-1)*(х+2)<0 при
х>0
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Answers & Comments
Verified answer
Определить знак произведения,если х>01) (х+1)*(х+3)( знаки :"+", "-" - это знаки выражения(х+1)*(х+3) )
+ - +
------------( - 3)-------------------( -1)-------------------------------------
I-------------------------------
0
Т.О (х+1)*(х+3)>0 при х>0
2) (-х-1)*(х+2)
- + -
------------( - 2)-------------------( -1)-------------------------------------
I-------------------------------
0
Т.О (-х-1)*(х+2)<0 при х>0