Practice problem
What is the intersection of the sets described by the following inequalities: x≤−1 and x>1x \le -1 \text{ and } x > 1x≤−1 and x>1
(−∞,−1]∪(1,∞)(-\infty,-1]\cup(1, \infty)(−∞,−1]∪(1,∞)
Empty set
(−1,1)(-1,1)(−1,1)
[−1,1)[-1,1)[−1,1)
Type a concept, like “slope” or “photosynthesis”.