Sep 18, 2016 · In boolean algebra, why is a+a'b = a+b? [duplicate] Ask Question Asked 9 years, 5 months ago Modified 6 years, 1 month ago

Jun 22, 2014 · So, the statement "if A = B, then B = A" is always (assumed to be) true in math, but it's not always true when applied to the meaning of words, which is what your friend is attempting to do.

Apr 9, 2018 · It's certainly possible, though you need additional laws such as De Morgan's law, as well the fact that $ (B^c)^c = B$.

Hi I have a question about the following algebra rule A + AB = A My textbook explains this as follows A + AB = A This rule can be proved as such: Step 1: Dustributive Law: A + AB = A*1 = A(1+B) Huh...

May 22, 2015 · While working out some intriguing qualities of absolute values for my studies of calculus, I frequently used the formula below. I know that the formula below is clearly correct but how would I pr...

One solution is $a=2$ and $b=4$ (should be pretty easy to prove that this is the only solution where $a,b\in\mathbb {N}$ and $a<b$).

Mar 9, 2017 · The only way to contradict "$A$ only if $B$" is to find $A$ being true when $B$ is false. But that is also the only way to contradict " (not $A$) or $B$"

Mar 20, 2015 · I'm struggling to get to grips with the Triangle Inequalities. The problem is I don't really understand what it means. This is what my lecturer has written in the notes: $$ |a+b|≤|a|+|b|. $$ First ...

Mar 26, 2020 · Another question from my 11th grade Mathematics textbook. I actually proved it but I still want to confirm if it's right or not. Please check it out : In order to prove that A-B=A ⇔ A⋂B=Φ, we will...

Jun 24, 2019 · I had my AS mock exam today, and this question came up. I've checked it on calculators and it says it simplifies to B, which is what I got in the exam, but I'm not entirely sure how I got there. My