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Nigina082
@Nigina082
July 2022
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Ришити двойные неравенства -2<3x+1<7
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NikitaNem
3x+1→-2
3x+1←7
3x+1→-2 3x+1←7
3x→-2-1 3x←7-1
3x→-3 3x←6
x→-3:3 x←6:3
x→-1 x←2
//////////////////////////////////////////////////
-------------∵------∵--------------------------------→
\\\\\\\\\\\\\\\-1\\\\\\\\2
ответ: x∈[-1;2]
4 votes
Thanks 3
NikitaNem
кстати //////////////////////////////////////////////////
-------------∵------∵--------------------------------→ -это
\\\\\\\\\\\\\\\-1\\\\\\\\2 кардинатный луч
NikitaNem
и да поставь на лучший ответ я старался
NikitaNem
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Answers & Comments
3x+1←7
3x+1→-2 3x+1←7
3x→-2-1 3x←7-1
3x→-3 3x←6
x→-3:3 x←6:3
x→-1 x←2
//////////////////////////////////////////////////
-------------∵------∵--------------------------------→
\\\\\\\\\\\\\\\-1\\\\\\\\2
ответ: x∈[-1;2]
-------------∵------∵--------------------------------→ -это
\\\\\\\\\\\\\\\-1\\\\\\\\2 кардинатный луч