Friday
December 6, 2013

# Posts by Francesca

Total # Posts: 155

Discrete Math
So, x = 1? Or can it be multiple answers? But what if I have a big equation like: 4x ≡ 320(mod n), n = 592

Discrete Math
Last thing I want to ask. . . 5x ≡ 5(mod 25) Is there an easier way to derive to the answer. Because I believed I learned the long version. This is what I know: The possible values are 0, 1, 2, 3 . . .24 5(0) - 5 = -5 not divisible by 25 5(1) - 5 = 0 not divisible by 25 ...

Discrete Math
I am too guilty of double posting disregard above 11:51

Discrete Math
Yea I was thinking that too, that it is the same thing,but I will double check with the teacher. So,With respect to congruence mod 29, 17 ∩ 423 = ∅ would be considered false, right?

Discrete Math
Yea I was thinking that too, that it is the same thing,but I will double check with the teacher. So,With respect to congruence mod 29, 17 ∩ 423 = ∅ would be considered false, right?

Discrete Math
OK. . .If you don't mind how about the these two too: • With respect to congruence mod 29, 17 ∩ 423 = ∅ (True) •If ac ≡ bc(mod n), and gcd(c, n) = 1, then a ≡ b(mod m) (True)

Discrete Math
I think I found something about the overbar _ a <--- equivalence class of a _ b <---equivalence class of b

Discrete Math
Could you tell me if I am correct in thinking: • With respect to congruence mod 29, 17 ∩ 423 = ∅ (True) • Let a, b, and n be integers with n > 1. Then a ≡ b (mod n) ⇔ a = b (False) •If ac ≡ bc(mod n), and gcd(c, n) = 1, then a &#...

Discrete Math
Hmmm...I kind of get what you are saying, but why is 18 not a set that does not include 2? Here is an example in the book that is true: _ 55 ∈ 7 (mod 3) _ 7 (the line goes over 7 in the above) Why would this be considered true?

Discrete Math
2 ∈ 18 (mod 8) It is true though, right?

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