Root It is a concept that has several uses. In this opportunity, we are interested in his meaning in the field of mathematics. The root, in this sense, is an amount that, when multiply certain times by itself , allows to reach a certain result.
The square root it 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 filing (the number that must be multiplied by itself) has a index (the number of times to be multiplied) of value 3 . The result of this filing It will be the root in question.
Before a square root In 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 himself (4 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 )
Thus, 4 raised to the cube is equal to 64 (and the cube root of 64 is 4 ).
Take the case of the cube root of 27 . In this case, we will notice that the answer is 3 , as 3 raised to the cube (3 x 3 x 3 ) is equal to 27 . The cube root of 27 well it is 3 .
3 x 3 = 9
9 x 3 = 27
(3 x 3 x 3 = 27 )
Virtually most people, except students who are now learning to make cube roots, resort to using a calculator to solve those that are put ahead. However, mathematics experts agree that there are a number of tricks that allow you to calculate them easily and without using any type of electronic device.
Specifically, in this regard, they establish the following:
-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.
-To be able to guess them you can always choose to make approximate calculations.
-Separate the issue number from right to left in groups of three figures. In this way, if there are one or two figures in the leftmost one, it will be possible to know since the cube root is less than 50.
Throughout history there have been prodigious minds with undeniable mathematical agility, who have managed to make mental calculations of cubic roots of numbers of many figures. This would be the case, for example, of Shakuntala Devi (1929 - 2013), who was known as the “calculating woman”. It toured the world since its early childhood showing the world its capabilities in that regard.
Specifically, it is part of the Guinness Book of Records for having become 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.