A simple math question in this year's college entrance exam

∧ means intersection, such as A∧B means set A and set B intersect the common **** part, read as "A intersect B".

∨is the meaning of concatenation, such as A∨B is the whole set AB, read as "A and B"

This is the concept of set that you will learn at the beginning of high school, there are the whole set, intersection, concatenation, complementary set, null set and so on.

This is just relatively simple to grasp, on the high school generally listen well to the class will be, the main test is the comprehensive application.