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- Geometry notation: what does $m\\angle ABC$ mean?
∠ABC refers to the physical angle itself while m∠ABC refers to its measure There isn't any difference between these two and it is absolutely correct to use any of them Some people just want to formalize things; these people think-"I have a car that is priced at 50000dollars, so i am driving a car and not 50000dollars" and so want to differentiate between little everything
- quadratics - Newtons Identity - Mathematics Stack Exchange
While reading about quadratic equations, I came across Newton's Identity formula which said we can express $\alpha^n+\beta^n$ in simpler forms but not given any explanation
- How to simplify $a^n - b^n$? - Mathematics Stack Exchange
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- summation - The idea behind the sum of powers of 2 - Mathematics Stack . . .
I know that the sum of powers of $2$ is $2^{n+1}-1$, and I know the mathematical induction proof But does anyone know how $2^{n+1}-1$ comes up in the first place For example, sum of n numbers is
- What is the formula for the difference between CI and SI?
If principal, time and rate are given how,do I find the difference between Compound interest and Simple Interest? p=12,000 n=1 and a 1 2 yrs r=10% per year Formulae that I know: CI - SI for 2 y
- How to add and subtract values from an average?
Say I have 100 numbers that are averaged: number of values = 100 total sum of values = 2000 mean = 2000 100 = gt; 20 If I want to add a value and find out the new average: total sum of values =
- How do you calculate the modulo of a high-raised number?
I need some help with this problem: $$439^{233} \\mod 713$$ I can't calculate $439^{223}$ since it's a very big number, there must be a way to do this Thanks
- Notations involving squiggly lines over horizontal lines
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