Generally speaking, let s be a * * *, A is a subset of S, and the * * of all elements in S that do not belong to A is called the complement (or complement) of subset A in S, and it is recorded as CsA.

In the theory of * * * and other branches of mathematics, there are two definitions of complementary sets: relative complementary sets and absolute complementary sets.

Complement set can be regarded as the subtraction of two * * *, sometimes called difference set.

1: If a, b and c are * * *, then the following identity holds: c? (A ∩B) = (C？ a)∨( C？ B) C？ (A ∪B) = (C？ A) ∩(C？ B) C？ (B？ A)=(A∩C)∩(C？ B) (B？ A) ∩C = (B ∩C)？ A = B ∩(C？ A) (B？ A) ∪C = (B ∪C)？ (A？ C) A？ a =φφ； ? a =φ； Answer? φ = A If a complete set U is given, the relative complement set of A in U is called the absolute complement set of A (or simply the complement set), and it is denoted as CA, that is, CA = U? A

Algorithms related to complementary sets

The rule of finding complement A∪CuA = SA∪CuA =φ focuses on learning the concept of complement. First of all, we must understand the relativity of the complete works. Cua, the symbol of complement, has three meanings: ①. A is a subset of u, that is, a is contained in u; ②.CuA stands for a * * *, and CuA is contained in U; (3) CuA is composed of all elements in U that do not belong to A. CuA and A have no common elements, and the elements in U are distributed in Cua and A..

Question 2: How can the symbols of the complement set be marked as 10 to 1? Use the formula editor in word. If you install it completely, there will be a formula editor in your word. If it is a typical installation, there will be no formula editor. If so, open Insert, Object Formula Editor 3.0, and then enter it here.

2. Insert a symbol. You can also use Insert- a special symbol to find the symbol.

3. Intelligent ABC uses V4; Sogou input method uses ctrl+shift+z.

In the theory of * * * and other branches of mathematics, there are two definitions of complementary sets: relative complementary sets and absolute complementary sets. Relative complement set: If A and B are * * *, the relative complement set of A in B is such a * * *: its elements belong to B but not to A, and B-A = {x| x∈B but x? Answer: Absolute Complement: If the complete set S is given, what is it? S, then the relative complement set of A in S is called the absolute complement set of A (or simply the complement set). Sa.

Note: To learn the concept of complement, we must first understand the relativity of complete works and the symbols of complement. SA has three meanings:

1, a is a subset of s, that is, a? s；

2、? SA stands for a * * *, and? UA？ u；

3、? SA is composed of all the elements in S that do not belong to A. SA and A have no common elements, but the elements in U are distributed in these two elements.

Complete set is a relative concept, which only contains all the elements involved in the studied problem. Complement sets are only relative to the corresponding complete sets. For example, when we study the problem in the integer range, Z is a complete set, and when the problem is extended to the real number set, R is a complete set, and the complementary set is only relative to this.