Watch in HD:
http://www.youtube.com/watch?v=pZzc_gDxCqo&hd=1
In this tutorial I demonstrate how to prove that the set of Rational numbers is 'closed over addition'. In other words, i show that the sum of 2 rational numbers is another rational number.
there is a slight mistake at 3:00 - it should be:
a + b = (ps+rq, qs) as opposed to (p+r, q+s)
but either way the conclusion is the same because ps+qr and qs are still integers.
http://perfectmindtutoring.com
there is a slight mistake at 3:00 - it should be: a + b = (ps+rq, qs) as opposed to (p+r, q+s)
but either way the conclusion is the same because ps+qr and qs are still integers.
EqualityInEducation 1 year ago