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Discrete Mathematics
if a.b is 0 and b.c is 0 then what is a.c?
Discrete Mathematics
List the ordered pairs in the relation R from A={0, 1, 2, 3, 4} to B={0, 1, 2, 3} where (a, b) ∈ R if and only if
1-a+b=4 R1
2-a=2b R2
3-Find R1 R2 and R2-1
1-a+b=4 R1
2-a=2b R2
3-Find R1 R2 and R2-1
Discrete Mathematics
prove that the fourth root of unity 1,-1,i,-i from an abelian multiplicative group.
Discrete Mathematics
Two dice are rolled, one blue and one red. How many outcomes are possible?
Discrete Mathematics
Two dice are rolled,one blue and one red.How many outcomes are possible?
Discrete Mathematics
The graph of {(x, 1/x) | x ≠0, x εR} is known as
Discrete Mathematics
prove that the relation R on Z defined by xRy if only if x≡y(mod) is transitive
prove that the relation R on Z defined by xRy if only if x≡y(mod) is transitive
prove that the relation R on Z defined by xRy if only if x≡y(mod) is transitive
Discrete Mathematics
What is the original message encrypted using the RSA system with n = 53 * 61 and e = 17 if the encrypted message is 3185 2038 2460 2550? (To decrypt, First find the decryption exponent d, which is the inverst of e = 13 modulo 42 * 58.)
Discrete Mathematics
Prove or disprove: For x, y ϵ R, if x is rational and y is irrational, then xy is irrational.
Detailed explanation: YES
Detailed explanation: YES
Discrete Mathematics
let A,B and C be sets. show that (A-B)-C=(A-C)-(B-C)
