Explain why {y||y| ¡Ü 1} is the same as [-1,1].

Answer 1

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]

Answer 2

THANKYOU :D

Answer 3

You're welcome!