Answer to Question #8058 in Discrete Mathematics for Eric Watson

Question #8058

Let a,b, c be integers. Prove that if a|b and a|(b+c) then a|c.

Expert's answer

Let a=14, b=2 and c=5. Obviously, a|b cause 14/2 = 7 and a|(b+c) cause 14/(2+5) = 14/7 = 2. But a isn't divisible by c cause 14 isn't divisible by 5. So, the statement is incorrect.

Learn more about our help with Assignments: Discrete Math

Comments

No comments. Be the first!

Leave a comment

Related Questions

1. Use the sigma notation to indicate the sum of all odd integers from 3 through 7643 inclusive
2. The nine employes of the Ellington Dance Studio each earn $600 per week. A new employee is hired who
3. how can you prove that the size of complement of K r,s graph is (r 2) + (s 2)
4. Determine the value of n and M to show that (x2 + 8)(x + 1) is big-O(xn). (Find the value of the exp
5. exactely what is discrete math
6. If a < 1/2 and b < 1/2 then a + b < 1 Write the converse of this statement. Is the convers
7. if A is an ideal set, prove that the average size of an element of A is at most n/2, by using local

Who Can Help Me with My Assignment

There are three certainties in this world: Death, Taxes and Homework Assignments. No matter where you study, and no matter…
How to Finish Assignments When You Can’t

Crunch time is coming, deadlines need to be met, essays need to be submitted, and tests should be studied for.…
How to Effectively Study for a Math Test

Numbers and figures are an essential part of our world, necessary for almost everything we do every day. As important…