# Mathematical Dictionary - Letter F

FACES - It is the polygons that delimit a solid. FACTOR - The integers multiplied in a multiplication are the factors. In the equation 3 × 2 = 6, 3 and 2 are the factors of 6.

FACTORIZATION - Factor operation (eg breaking a number into prime factors).

FACTORIAL (!) - The product is a number for all integers before it, until it reaches 1. Example: 6! = 6.5.4.3.2.1.

GEOMETRIC FIGURE - A drawing serves to represent several mathematical notions. A geometric figure can have dimension: 0, 1, 2, 3,…, n.

FLAT FIGURE - It is a two-dimensional figure, such as circle, square, pentagon, trapezoid, etc.

FOCUS - Fixed point (s) used to define a conic.

SPACE FORM - Geometric figures having three dimensions; Geometric solids.

FORMULA - Expression that indicates, in mathematical language, the calculations that must be performed to obtain a certain result.

EULER FORMULA - In a polyhedron it is found that F + V = A + 2. Example: In the cube there are 6 faces and 8 vertices, so the number of edges will be 12.

FRACTION - Represents the parts of a whole or a set, the ratio of two integers or a division. In common language, fraction means part. Split, apportion.

DECIMAL FRACTION - A fractional number that expresses a decimal form. As for example 2.1 or 9.56.

Irreducible Fraction - A fraction where the numerator and denominator do not have a common factor greater than 1. Fraction 3/4 is irreducible, but 5/25 is not.

ORDINARY FRACTION - It is the fraction that is not decimal. The 1/4 fraction is ordinary.

SIMPLIFIED FRACTION - See irreducible fraction.

EQUIVALENT FRACTIONS - They are fractions that represent the same amount. Fractions 1/2, 2/4 and 8/16 are equivalent.

Inverse Fractions - Two fractions whose product is 1. Fractions 5/3 and 3/5 are inverse, as 5 / 3.3 / 5 = 1.

FREQUENCY - The number of times a given event occurs within a given time frame.

RELATIVE FREQUENCY - Is the percentage of an event in the sum of all events in a sample.

OCCUPATION - It is a univocal correspondence between two sets in which each element of the first set corresponds to one and only one element of the second.

AIM FUNCTION - Polynomial function of degree 1.

BIJECTOR FUNCTION - Function that is injector and injector.

CIRCULAR FUNCTION - Periodic functions referenced in the unit circle. Example: Sine, Cosine, Tangent, etc.

CONSTANT FUNCTION - A function is constant over a range if for any x1 and x2 of this interval f (x1) = f (x2), or, to put it another way, zero degree polynomial function.

GROWING FUNCTION - A function is increasing by a range if for any x1 and x2 of this interval f (x1) <f (x2).

INCREASING FUNCTION - A function such that for any values ​​a> b in your domain you have f (a) <f (b).

INJECTOR FUNCTION - Function for which for any values ​​of x1 and x2, f (x1) is different from def (x2).

INVERSE FUNCTION - A function g is the inverse of a function f if it is bijective and for f (x) = y, g satisfies g (y) = x, that is, g undoes the transformation of f.

LINEAR FUNCTION - Polynomial function of degree 1 with the linear coefficient equal to zero.

Logarithmic Function - The inverse function of an exponential function. So if we have y = ax the logarithmic function will be x = logThey, where a is the so-called base.

POLINOMIAL FUNCTION - Function that has the form of a polynomial: f (x) = A0 x0 + A1 x1 + A2 x2 +… + Ano xno.

QUADRATIC FUNCTION - Second degree polynomial function.

OVERLAY FUNCTION - A function is overpowering if the image set of the function is equal to the contradiction.

PERIODIC FUNCTIONS - Functions whose values ​​are repeated at each interval (period). For example the trigonometric functions.

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