Root it is a concept that has several uses. On this occasion, we are interested in its meaning in the field of mathematics. The root, in this sense, is a quantity that, when multiply certain times by itself, allows to reach a certain result.
The Cube root is the root that supposes multiply a number three times by itself to access the result. In other words, the cube root is the operation in which the residing (the number that must be multiplied by itself) has a index (the number of times to multiply) of value 3. The result of this settlement will be the root in question.
Before a Cube rootIn short, we have to raise a number to the Cube, multiplying it three times by itself. Suppose we want to know what is the cube root of 64. The answer is 4: if we multiply 4 three times by itself4 x 4 x 4), we will see that the result is 64.
4 x 4 = 16
16 x 4 = 64
(4 x 4 x 4 = 64)
Therefore, 4 cubed equals 64 (and the cube root of 64 it is 4).
Take the case of the cube root of 27. In this case, we will notice that the answer it is 3, given that 3 raised to the cube3 x 3 x 3) is equal to 27. The cube root of 27well, it is 3.
3 x 3 = 9
9 x 3 = 27
(3 x 3 x 3 = 27)
Virtually most people, except for students who are now learning to do cube roots, resort to using a calculator to solve the problems that lie ahead. However, experts in mathematics agree that there are a series of tricks that allow calculating them in a simple way and without using any type of electronic device.
Specifically, in this sense, they establish the following:
-It facilitates the mental resolution of these roots knowing by heart what the cubes of the first ten numbers are, that is, from 1 to 10.
-In order to guess them, you can always choose to make approximate calculations.
-Separate the question number from right to left into groups of three figures. In this way, if there are one or two figures left in the one on the left, you can already know that the cube root is less than 50.
Throughout history there have been prodigious minds with undeniable mathematical agility, who have been able to make mental calculations of cube roots of many-digit numbers. This would be the case, for example, of Shakuntala Devi (1929 – 2013), who was known as the “calculating woman”. She traveled the world since her early childhood showing the world her capabilities in this regard.
Specifically, it is part of the Guiness Book of Records for having been able to make, in less than a minute, the discovery of the root 23 of a number that had neither more nor less than 201 digits.