April 19, 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:

Related Questions

Calculus II - 1) Compute the indefinite integral: integral 2x ln(x^2 - 8x + 18) ...
math - Prove the identity: cos^4(x)-sin^4(x)=1-2sin^2(x).with explanation im ...
math,help - this other one how can i actually prove it if this is the equation ...
math - My math teacher wants us to prove that all of our answers are correct. ...
Math - Use mathematical induction to prove that 5^(n) - 1 is divisible by four ...
math analysis - i need help.. im not really sure how to start. There exist an ...
math - i am having a hard time with factoring i have read what is here but am ...
Discrete Math - Use mathematical induction to prove the truth of each of the ...
physics - Find the tangential acceleration of a freely swinging pendulum when it...
math - use mathematical induction to prove -1/2^n = 1/2^n - 1