Fonksiyon (Fransızca), İşlev (Türkçe) matematikte değişken sayıları girdi olarak kabul edip bunlardan bir çıktı sayısı oluşmasını sağlayan kurallardır. Bir işlem türüdür. Dört işlemden sonra gelir.

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• Fonksiyon (Fransızca), İşlev (Türkçe) matematikte değişken sayıları girdi olarak kabul edip bunlardan bir çıktı sayısı oluşmasını sağlayan kurallardır. Bir işlem türüdür. Dört işlemden sonra gelir.
• 数学における関数（かんすう、英: function、函数とも）とは、ある変数に依存して決まる値あるいはその対応を表す式の事である。この言葉はライプニッツによって導入された。その後定義が一般化されて行き、現代的には数の集合に値をとる写像の一種であると理解される。
• In mathematics, a function is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output. An example is the function that relates each real number x to its square x2. The output of a function f corresponding to an input x is denoted by f(x) (read "f of x"). In this example, if the input is −3, then the output is 9, and we may write f(−3) = 9. The input variable(s) are sometimes referred to as the argument(s) of the function.Functions of various kinds are "the central objects of investigation" in most fields of modern mathematics. There are many ways to describe or represent a function. Some functions may be defined by a formula or algorithm that tells how to compute the output for a given input. Others are given by a picture, called the graph of the function. In science, functions are sometimes defined by a table that gives the outputs for selected inputs. A function could be described implicitly, for example as the inverse to another function or as a solution of a differential equation.The input and output of a function can be expressed as an ordered pair, ordered so that the first element is the input (or tuple of inputs, if the function takes more than one input), and the second is the output. In the example above, f(x) = x2, we have the ordered pair (−3, 9). If both input and output are real numbers, this ordered pair can be viewed as the Cartesian coordinates of a point on the graph of the function. But no picture can exactly define every point in an infinite set.In modern mathematics, a function is defined by its set of inputs, called the domain; a set containing the set of outputs, and possibly additional elements, as members, called its codomain; and the set of all input-output pairs, called its graph. (Sometimes the codomain is called the function's "range", but warning: the word "range" is sometimes used to mean, instead, specifically the set of outputs. An unambiguous word for the latter meaning is the function's "image". To avoid ambiguity, the words "codomain" and "image" are the preferred language for their concepts.) For example, we could define a function using the rule f(x) = x2 by saying that the domain and codomain are the real numbers, and that the graph consists of all pairs of real numbers (x, x2). Collections of functions with the same domain and the same codomain are called function spaces, the properties of which are studied in such mathematical disciplines as real analysis, complex analysis, and functional analysis.In analogy with arithmetic, it is possible to define addition, subtraction, multiplication, and division of functions, in those cases where the output is a number. Another important operation defined on functions is function composition, where the output from one function becomes the input to another function.
• Intuïtivament, una funció és una «transformació» d'un objecte en un altre objecte. Així, hi ha funcions que transformen nombres en nombres (per exemple les funcions polinòmiques, les funcions trigonomètriques, ...), funcions que transformen formes geomètriques en formes geomètriques (per exemple les rotacions, translacions, homotècies, ...), funcions que transformen una forma geomètrica en un nombre (per exemple la llargària d'un segment, l'àrea delimitada per un polígon, ...) i, en general, funcions que transformen elements d'un conjunt de partida A en elements d'un conjunt d'arribada B.
• Funkce je v matematice název pro zobrazení z nějaké množiny M do množiny čísel (většinou reálných nebo komplexních), nebo do vektorového prostoru (pak se mluví o vektorové funkci). Je to tedy předpis, který každému prvku z množiny M jednoznačně přiřadí nějaké číslo nebo vektor (hodnotu funkce). Někdy se však slovo funkce používá pro libovolné zobrazení.
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• Fonksiyon (Fransızca), İşlev (Türkçe) matematikte değişken sayıları girdi olarak kabul edip bunlardan bir çıktı sayısı oluşmasını sağlayan kurallardır. Bir işlem türüdür. Dört işlemden sonra gelir.
• 数学における関数（かんすう、英: function、函数とも）とは、ある変数に依存して決まる値あるいはその対応を表す式の事である。この言葉はライプニッツによって導入された。その後定義が一般化されて行き、現代的には数の集合に値をとる写像の一種であると理解される。
• Funkce je v matematice název pro zobrazení z nějaké množiny M do množiny čísel (většinou reálných nebo komplexních), nebo do vektorového prostoru (pak se mluví o vektorové funkci). Je to tedy předpis, který každému prvku z množiny M jednoznačně přiřadí nějaké číslo nebo vektor (hodnotu funkce). Někdy se však slovo funkce používá pro libovolné zobrazení.
• In mathematics, a function is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output. An example is the function that relates each real number x to its square x2. The output of a function f corresponding to an input x is denoted by f(x) (read "f of x"). In this example, if the input is −3, then the output is 9, and we may write f(−3) = 9.
• En matemáticas, se dice que una magnitud o cantidad es función de otra si el valor de la primera depende exclusivamente del valor de la segunda. Por ejemplo el área A de un círculo es función de su radio r: el valor del área es proporcional al cuadrado del radio, A = π·r2.
• Intuïtivament, una funció és una «transformació» d'un objecte en un altre objecte.
rdfs:label
• Fonction (mathématiques)
• Fonksiyon
• Funció
• Función matemática
• Functie (wiskunde)
• Function (mathematics)
• Fungsi (matematika)
• Funkce (matematika)
• Funkcja
• Funktion (Mathematik)
• Funtzio (matematika)
• Funzione (matematica)
• Função (matemática)
• Függvény (matematika)
• Функция
• Функция (математика)
• 関数 (数学)
• 함수
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