# Discrete Math

posted by .

For sets A, B, C is a subset of U, prove or disprove (with a counter-example) the following: If A is a subset of B, B is not a subset of C, then A is not a subset of C,

• Discrete Math -

A={1,2}
B={1,2,3}
C={1,2,4}
false

## Similar Questions

1. ### smallest algebra

Let F be a family of subsets of a set X such that empty set is the element of F. A subset A of X belongs to F1 if and only if either A is a subset of F or complement of A is the subset of F. A subset B of X belongs to F2 if and only …
2. ### Math

I was to answer this question: How are the idea of subsets and proper subsets used in counting to identify relationships between whole numbers?
3. ### Math

Describe whether the following statements are true or false and explain. A. If n(A)<n(B), then A is a proper subset of B. B. If n(A) is less than or equal to n(B), then A is a subset of B. C. If A is a proper subset of B, then n(A)<n(B). …
4. ### Set Theory

Given the sets A=[a,b], B=[a,b,c], C=[b,c,d] Prove that if A is a subset of B and B is a subset of C then A is a subset of C
5. ### Set Thoery

(1)Given the sets A={a,b}, B={a,b,c}, C= {b,c,d}. which of these sets are: (i) Equal (ii) Comparable (iii) Subset (2) Prove that if A is a subset of B and B is a subset of C then A is a subset of C
6. ### Math(Subsets)

Part 1 I have to use symbols in my anwser Suppose B is proper subset of C If n(c)=8, what is the maxium number of elements in n (B) What is the least possible numbers of Elements in B?
7. ### Foundations in Information Technology

Give an example of a subset and a proper subset. Explain the difference between a subset and proper subset.
8. ### Survey of Mathematics

Give an example of a subset and a proper subset. Explain the difference between a subset and proper subset. plz help
9. ### Math

I have to make a true statement with this question: {All states west of the Rocky Mountains} {All states west of the Atlantic Ocean} I have to determine if the two statements are: Proper Subset is a subset of is not a subset of proper …
10. ### maths

Let A1 = { 1 , 2 , 3 , 4 , 5 , 6 }, A2 = { 7 , 8 , 9 , 10 , 11 , 12 , 13 } and A3 = { 14 , 15 , 16 , 17 , 18 , 19 }. How many non-empty sets are there which are a subset of A1 OR a subset of A2 Or a subset of A3?

More Similar Questions