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December 19, 2014

December 19, 2014

Posted by **Stephanie** on Thursday, September 27, 2007 at 10:54pm.

?Suppose a, b, and c are integers such that a divides b and b divides c. Prove that a divides c.

- Advanced Math -
**drwls**, Friday, September 28, 2007 at 3:38pmIf b is an integer factor of b, and b is an integer factor of x, then

b = ma and c = nb, where m and n are both integers.

It follows that c = m n a. Since m and n are both integers, so is mn. Therefore a is an integer factor of c, or, in other words, "a divides c".

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