Wednesday
July 30, 2014

Homework Help: elementary math

Posted by anna on Friday, January 25, 2013 at 1:29am.

i did use my poof to prove. im not sure im doing right.

here is exercises:
'Suppose a,b,c are integers if a|b and a|c, then a|(b+c).'

my answer:
Proof. Suppose a|b ans a|c.
By Definition of divisibility. we know a|b means there is an integer x with b= ax.
Likewise, a|c means there is an integer y for which c= ay
Thus b+c=(ax+ay)= a(x+y)
therefore a|(b+c).

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

college math question - Find the GCD of 24 and 49 in the integers of Q[sqrt(3...
Math: Integers - Hey guys! I need help with this problem..it tells me to write a...
discrete math - 1)prove that if x is rational and x not equal to 0, then 1/x is ...
math - Let f:ℤ+ → ℤ+ be the function defined by: for each x &#...
math help please - Let f:ℤ+ → ℤ+ be the function defined by: ...
discrete math - Let f:ℤ+ → ℤ+ be the function defined by: for...
Calculus II - 1) Compute the indefinite integral: integral 2x ln(x^2 - 8x + 18) ...
math induction - prove the product of 4 consecutive integers is always divisible...
Geometry - Hello, I hope that I got all these questions right, but is important ...
math - Factor: x^3 - 3/4x - 1/4 The answer is: (x - 1)(x + 1/2)^2 How do I learn...

Search
Members