mathmath333
  • mathmath333
true or false
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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mathmath333
  • mathmath333
.\(\large \color{black}{\begin{align}\text{For } x\in \mathbb{R}\\~\\ \mid x\mid= \begin{cases} x, & x\geq 0 \\ -x, & x<0 \end{cases} \hspace{.33em}\\~\\ \end{align}}\)
anonymous
  • anonymous
It is true. If, for example x is equal to -1: \[\left| -1 \right| = -1.(-1) = 1\] and if x is positive, it is already positive.
mathmath333
  • mathmath333
@peachpi

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mathmath333
  • mathmath333
how can |x|=-x for x<0
anonymous
  • anonymous
If x < 0, then x is negative. -x returns a positive value
anonymous
  • anonymous
-(-1) = 1
mathmath333
  • mathmath333
how do i read this \(\large \color{black}{\begin{align}\mid x\mid= \begin{cases} x, & x\geq 0 \\ -x, & x<0 \end{cases} \hspace{.33em}\\~\\ \end{align}}\)
anonymous
  • anonymous
the absolute value of x is equal to x for x greater than or equal to 0 and is equal to negative x for x less than 0.
mathmath333
  • mathmath333
ok and it is true ?
anonymous
  • anonymous
yes
mathmath333
  • mathmath333
ok thnk u :)
anonymous
  • anonymous
you're welcome

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