inverse function

(noun)

a function that does exactly the opposite of another

Related Terms

  • binary
  • derivative

Examples of inverse function in the following topics:

  • Inverse Functions

    • An inverse function is a function that undoes another function: For a function $f(x)=y$ the inverse function, if it exists, is given as $g(y)= x$.
    • Inverse function is a function that undoes another function: If an input $x$ into the function $f$ produces an output $y$, then putting $y$ into the inverse function $g$ produces the output $x$, and vice versa. i.e., $f(x)=y$, and $g(y)=x$.
    • A function $f$ that has an inverse is called invertible; the inverse function is then uniquely determined by $f$ and is denoted by $f^{-1}$ (read f inverse, not to be confused with exponentiation).
    • Not all functions have an inverse.
    • A function $f$ and its inverse $f^{-1}$.
  • Inverse Functions

    • An inverse function is a function that undoes another function.
    • A function $f$ that has an inverse is called invertible; the inverse function is then uniquely determined by $f$ and is denoted by $f^{-1}$.
    • Stated otherwise, a function is invertible if and only if its inverse relation is a function on the range $Y$, in which case the inverse relation is the inverse function.
    • Not all functions have an inverse.
    • A function $f$ and its inverse, $f^{-1}$.
  • Inverse Trigonometric Functions: Differentiation and Integration

    • It is useful to know the derivatives and antiderivatives of the inverse trigonometric functions.
    • The inverse trigonometric functions are also known as the "arc functions".
    • There are three common notations for inverse trigonometric functions.
    • They can be thought of as the inverses of the corresponding trigonometric functions.
    • The following is a list of indefinite integrals (antiderivatives) of expressions involving the inverse trigonometric functions.
  • Continuity

    • A continuous function is a function for which, intuitively, "small" changes in the input result in "small" changes in the output.
    • A continuous function is a function for which, intuitively, "small" changes in the input result in "small" changes in the output.
    • Otherwise, a function is said to be a "discontinuous function."
    • A continuous function with a continuous inverse function is called "bicontinuous."
    • This function is continuous.
  • Hyperbolic Functions

    • Hyperbolic function is an analog of the ordinary trigonometric function, also called circular function.
    • The basic hyperbolic functions are the hyperbolic sine "$\sinh$," and the hyperbolic cosine "$\cosh$," from which are derived the hyperbolic tangent "$\tanh$," and so on, corresponding to the derived functions.
    • The inverse hyperbolic functions are the area hyperbolic sine "arsinh" (also called "asinh" or sometimes "arcsinh") and so on.
    • The hyperbolic functions take real values for a real argument called a hyperbolic angle.
    • When considered defined by a complex variable, the hyperbolic functions are rational functions of exponentials, and are hence meromorphic.
  • Exponential and Logarithmic Functions

    • Exponential function is the function $e^x$ the number (approximately 2.718281828) such that the function $e^x$ is its own derivative .
    • Sometimes the term exponential function is used more generally for functions of the form $f(x)=cb^x$, where the base $b$ is any positive real number and $c$ is a constant.
    • The exponential function $e^x$ can be characterized in a variety of equivalent ways.
    • For $f(x)=e^x$, $g(x)=\log_e(x)$ is the inverse function of $f(x)$ and vice versa.
    • The derivative (or slope of a tangential line) of the exponential function is equal to the value of the function.
  • The Natural Exponential Function: Differentiation and Integration

    • Now that we have derived a specific case, let us extend things to the general case of exponential function.
    • Here we consider integration of natural exponential function.
    • Note that the exponential function $y = e^{x}$ is defined as the inverse of $\ln(x)$.
  • Basic Integration Principles

    • Integration is the process of finding the region bounded by a function; this process makes use of several important properties.
    • Integration is an important concept in mathematics and—together with its inverse, differentiation—is one of the two main operations in calculus.
    • The term integral may also refer to the notion of the anti-derivative, a function $F$ whose derivative is the given function $f$.
    • Given two functions $f(x)$ and $g(x)$, we can use the following identity:
    • A definite integral of a function can be represented as the signed area of the region bounded by its graph.
  • The Definite Integral

    • Integration is an important concept in mathematics and—together with its inverse, differentiation—is one of the two main operations in calculus.
    • We ask, "What is the area under the function $f$, over the interval from 0 to 1?
    • Notice that we are taking a finite sum of many function values of $f$, multiplied with the differences of two subsequent approximation points.
    • A definite integral of a function can be represented as the signed area of the region bounded by its graph.
    • Compute the definite integral of a function over a set interval
  • Area and Distances

    • Integration is an important concept in mathematics and—together with its inverse, differentiation—is one of the two main operations in calculus.
    • We ask, "What is the area under the function $f$, over the interval from $0$ to $1$?
    • Notice that we are taking a finite sum of many function values of $f$, multiplied with the differences of two subsequent approximation points.
    • However, you can also use integrals to calculate length—for example, the length of an arc described by a function $y = f(x)$.
    • A definite integral of a function can be represented as the signed area of the region bound by its graph.
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