math
posted by Fakaapo. Suetusi .
What can you say about sets A and B if you know that.
1)A U B = A?
2)A ¿ B = A?
3)A  B = A?

1. A ⊇ B , B is a subset of A
2. not familiar with the operator ¿ in sets
3. Did not know that "" was an operator with sets 
I assume 2) is intersection
If the intersection of A and B = A, then A is a subset of B.
AB is the members of A that are not in B. If that is equal to A, then B is empty. 
Hmmm. On that last one, AB=A means that A and B are disjoint, or B is empty.
Respond to this Question
Similar Questions

Math
My question is this: If two sets are equivalents does that mean that they are equal. I say no but I'm not sure how to explain my answer can you help me? 
English
1. I don't know who to say. 2. I don't know who to say about. 3. I don't know who I should say to. 4. I don't know who should say. 5. I don't know whom to say. 6. i don't know whom to say about. (Which expressions are right? 
English
1. I don't know who to say. 2. I don't know who to say to. 3. I don't know whom to say. 4. I don't know whom to say to. 5. I don't know who to say about. 6. I don't know whm to say about. 7. I don't know to whom to say. (Which ones … 
college math for teachers
Use the following sets to complete the givien statements in as many ways as possible. a= a,b,c,d b= e,f c=b,a,c,d d= 1,2,3,4 A. Sets _ and _ are not equivalent and not equal B. Sets _ and _ are not equivalent but are equal. C. Sets … 
allied health
I want to say D. Not sure here Which of the following is true in regard to limited data sets? 
Discrete Math
Justifying your conclusions (you could also use examples in order to illustrate your results). What can you say about the sets A and B if we know that: 1. A ∪ B = A 2. A ∩ B = A Thanks for any helpful replies :) 
math
Marvin Company has a beginning inventory of 12 sets of paints at a cost of $1.50 each. During the year, the store purchased 4 sets at $1.60, 6 sets at $2.50 and 10 sets at $3.00. By the end of the year, 25 sets were sold. Calculated … 
Business Math
Being inventory of 12 sets of paints at a cost of $1.50 each. During the year the store purchased 4 sets at $1.60, 6 sets at $2.20, 6 sets at $2.50, and 10 sets at $3.00. By the end of the year, 25 sets were sold. Caculate the number … 
MATH HELP
Suppose two sets of data, A and B, have the same MIN and MAX values, but that the IQR for A is larger than the IQR for B. What can you CORRECTLY conclude about the two sets? 
Math
A bag contains 5 red marbles, 3 green, 1 lavender, 3 yellow, 2 Orange. Q. How many sets of four marbles include none of the red ones?