Ajude ai por favor
Ao resolver a equação modular |2x -1| = 3 obtém-se:
{-2,1}
{1,2}
{2,-1}
{0,3}
{0,-3}
Soluções para a tarefa
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Bom dia!
Solução!
![|2x-1|=3\\\\\\
2x-1=3\\\\\\
2x=3+1\\\\\
2x=4\\\\\
x= \dfrac{4}{2}\\\\\\ \boxed{x=2}](https://tex.z-dn.net/?f=%7C2x-1%7C%3D3%5C%5C%5C%5C%5C%5C%0A2x-1%3D3%5C%5C%5C%5C%5C%5C%0A2x%3D3%2B1%5C%5C%5C%5C%5C%0A2x%3D4%5C%5C%5C%5C%5C%0Ax%3D+%5Cdfrac%7B4%7D%7B2%7D%5C%5C%5C%5C%5C%5C+%5Cboxed%7Bx%3D2%7D+ "|2x-1|=3\\\\\\
2x-1=3\\\\\\
2x=3+1\\\\\
2x=4\\\\\
x= \dfrac{4}{2}\\\\\\ \boxed{x=2}")
![|2x-1|=-3\\\\\\
2x-1=-3\\\\\\
2x=-3+1\\\\\
2x=-2\\\\\\
x= \dfrac{-2}{2} \\\\\\
\boxed{x=-1}](https://tex.z-dn.net/?f=%7C2x-1%7C%3D-3%5C%5C%5C%5C%5C%5C%0A2x-1%3D-3%5C%5C%5C%5C%5C%5C%0A2x%3D-3%2B1%5C%5C%5C%5C%5C%0A2x%3D-2%5C%5C%5C%5C%5C%5C%0Ax%3D+%5Cdfrac%7B-2%7D%7B2%7D+%5C%5C%5C%5C%5C%5C%0A%5Cboxed%7Bx%3D-1%7D "|2x-1|=-3\\\\\\
2x-1=-3\\\\\\
2x=-3+1\\\\\
2x=-2\\\\\\
x= \dfrac{-2}{2} \\\\\\
\boxed{x=-1}")
Solução!
batistap55:
obrigada JBK
Dê nada!
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