Question

Are following sets are equal to \[A = \{-1,-2,1,2\}\]?
\[ A = \{x \in \mathbb{Z}:\, |x|\le 2, x\ne 0\}\]
\[A = \{x \in \mathbb{Z}:\, 0 < x\le 2\}\]
\[A = \{x \in \mathbb{Z}:\, \frac{4}{|x|}\le 4\}\]

Answer 1

option A says:
all the integers that are less than or equal in magnitude to two, but not the integer zero.

option B says:
all of the integers greater than zero and less than or equal to two.

option C says:
all of the integers for which: four divided by their magnitude is less than or equal to four.