Current location - Training Enrollment Network - Mathematics courses - How to do the math set problem?
How to do the math set problem?
This problem mainly investigates the nature of the intersection of functions and sets.

It can be seen that sets A and B are points on functions, and A∩B is the intersection of two functions. We can draw a picture and know that two functions have two intersections.

So the set A∩B contains two elements. According to a set of formulas in which n elements * * * have 2 n subsets, where a * * * has 2? =4 subsets.

Off-topic: If the topic asks you to write A∩B, you can use simultaneous binary function equation to calculate.