I was wondering that $10$ is a Natural number or not as it contains $0$ (zero) in it which is not a Natural number for sure, so $10$ is a Natural number o...

I'm having problems to understand the definition of the level of significance $\alpha$. I thought I knew what $\alpha$ is but I realized I don't...

Okay, so I've read a few different meanings for the exclamation point in a statement. For example: $$!\exists x \in O \ni 2x < 5$$ The only questi...

Find all solutions $x \in \mathbb{Z}_{m}$ of the following congruence whereby $m$ is the modulus. If there doesn't exist a solution, state why.$$17x ...

If an angle is the measure of distance between to points (Edit: Ok, admittedly bad phrasing. A measure of rotation between two intersecting lines, or poin...

I have several cubes, those cubes have the 8 vertices, for example: Vet X Y Z ----- CUBE1 ----- (top side) V1: -0.5 0.5 0.5 V2: 0.5 0.5 0.5 V3: 0.5 0.5 -0...

$$ \int_{\partial \Omega} (u ~dx + v ~dy) = \iint_{\Omega} \left( \frac{\partial v}{\partial x} - \frac{\partial u}{\partial y} \right) ~dx ~dy $$ Then I ...

I need a sign for an even number (not $a\cdot 2$) in my formula. I tried to google it, but I saw only $2a$. Please tell me if there is a special sign?

What is the definition of a free abelian group generated by the set $X$? If $X=\{A,B,C,D\}$ what are the elements of the free abelian group on this set? W...

I have a problem on my home work for applied discrete math How many bit strings of length 10 contain A) exactly 4 1s the answer in the book is 210 I solve...