Asked by Pauline

Explain why {y||y| ¡Ü 1} is the same as [-1,1].
Answered by MathMate
For
{y | |y|≤1}

By definition of the absolute function, |y| = y if y≥0, and
|y| = -y if y<0.

Therefore the possible values of |y|≤1 are [-1,1]
Answered by Pauline
THANKYOU :D
Answered by MathMate
You're welcome!