Given that $\mathbb{R}^n$ is the notation used for n-dimensional vectors, is there an accepted equivalent notation for matrices?

I am a programmer moving up to computer science and even in my past life as a mechanical engineer I used sufficient maths to get by but I have always wond...

I was wondering what "nC0", or taking n objects zero times at once, really means. I could not really find an answer to this elsewhere, except for a place ...

I wanted to know if I did this problem right or not. $A$ and $B$ are the following matrices: $A=\begin{bmatrix}2&6\\1&-3\end{bmatrix},$ $B=\begin{...

$e^\pi-\pi\approx 19.99909998$ Why is this so close to $20$?

How can I prove using an induction technique that an even number plus an odd number is always equals to an odd number? Thanks in advance!

Question: Calculate the volume of the region in $y > 0$ enclosed by the planes $y = 0, z = 0, z = d − x + y$ and the parabolic cylinder $y=d-{x^2}/d$, ...

The experiment is rolling a pair of dice, two times. Rolling a $7$, $11$, or doubles is a success, rolling anything else is a failure. What is the probabi...

My friend was fiddling around on the triangle when he created an irregular heptagon with it not able to tessellate. He then asked me if I could create an ...

Find $y'$ if $y=\cos^{-1}(\sin x)$ It is solved as $$ y=\cos^{-1}(\cos(\pi/2-x))=\frac{\pi}{2}-x\\ y'=-1 $$ My Attempt The function is defined f...