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Image credits: astarisaslave #8. TIL in South Korea, only blind people can get a masseur's license. This law was established in 1912, to help visually impaired people earn a living.
Here’s another fun fact: every time you learn something, your brain is never the same again. It physically changes whenever you gain new information, skills, or experiences.
Suppose one needs to square a number n near 50. The number may be expressed as n = 50 − a so its square is (50−a) 2 = 50 2 − 100a + a 2. One knows that 50 2 is 2500. So one subtracts 100a from 2500, and then add a 2. For example, say one wants to square 48, which is 50 − 2. One subtracts 200 from 2500 and add 4, and get n 2 = 2304.
This is a timeline of pure and applied mathematics history.It is divided here into three stages, corresponding to stages in the development of mathematical notation: a "rhetorical" stage in which calculations are described purely by words, a "syncopated" stage in which quantities and common algebraic operations are beginning to be represented by symbolic abbreviations, and finally a "symbolic ...
Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.
We all get bored at some point. One survey found that the average American adult experiences 131 days of boredom per year. And most of it happens at work.Another study revealed that employees are ...
A functional differential equation of delay differential equation is a function equation involving derivatives of the unknown functions, evaluated at multiple points, such as ′ = () A difference equation is an equation where the unknown is a function f that occurs in the equation through f ( x ), f ( x −1), ..., f ( x − k ), for some ...