natural logarithm

(noun)

the logarithm in base $e$

Related Terms

Examples of natural logarithm in the following topics:

  • The Natural Logarithmic Function: Differentiation and Integration

    • Differentiation and integration of natural logarithms is based on the property $\frac{d}{dx}\ln(x) = \frac{1}{x}$.
    • The natural logarithm, generally written as $\ln(x)$, is the logarithm with the base e, where e is an irrational and transcendental constant approximately equal to $2.718281828$.
    • The natural logarithm allows simple integration of functions of the form $g(x) = \frac{f '(x)}{f(x)}$: an antiderivative of $g(x)$ is given by $\ln\left(\left|f(x)\right|\right)$.

  • Bases Other than e and their Applications

    • These are $b = 10$ (common logarithm); $b = e$ (natural logarithm), and $b = 2$ (binary logarithm).
    • In this atom we will focus on common and binary logarithms.
    • Mathematicians, on the other hand, wrote $\log(x)$ when they meant $\log_e(x)$ for the natural logarithm.
    • Binary logarithm ($\log _2 n$) is the logarithm in base $2$.
    • For example, the binary logarithm of $1$ is $0$, the binary logarithm of $2$ is 1, the binary logarithm of $4$ is $2$, the binary logarithm of $8$ is $3$, the binary logarithm of $16$ is $4$, and the binary logarithm of $32$ is $5$.

  • Further Transcendental Functions

    • Examples of transcendental functions include the exponential function, the logarithm, and the trigonometric functions.
    • Note that, for $ƒ_2$ in particular, if we set $c$ equal to $e$, the base of the natural logarithm, then we find that $e^x$ is a transcendental function.
    • Similarly, if we set $c$ equal to $e$ in ƒ5, then we find that $\ln(x)$, the natural logarithm, is a transcendental function.
    • One could attempt to apply a logarithmic identity to get $\log(10) + \log(m)$, which highlights the problem: applying a non-algebraic operation to a dimension creates meaningless results.

  • Derivatives of Logarithmic Functions

    • The general form of the derivative of a logarithmic function is $\frac{d}{dx}\log_{b}(x) = \frac{1}{xln(b)}$.
    • Here, we will cover derivatives of logarithmic functions.
    • First, we will derive the equation for a specific case (the natural log, where the base is $e$), and then we will work to generalize it for any logarithm.
    • We can use the properties of the logarithm, particularly the natural log, to differentiate more difficult functions, such as products with many terms, quotients of composed functions, or functions with variable or function exponents.
    • We do this by taking the natural logarithm of both sides and re-arranging terms using the following logarithm laws:

  • Exponential and Logarithmic Functions

    • Both exponential and logarithmic functions are widely used in scientific and engineering applications.
    • In other words, the logarithm of $x$ to base $b$ is the solution $y$ to the equation $b^y = x$ .
    • The logarithm to base $b=10$ is called the common logarithm and has many applications in science and engineering.
    • The natural logarithm has the constant e ($\approx 2.718$) as its base; its use is widespread in pure mathematics, especially calculus.
    • The binary logarithm uses base $b=2$ and is prominent in computer science.

  • Logarithmic Functions

    • The logarithm to base $b = 10$ is called the common logarithm and has many applications in science and engineering.
    • The natural logarithm has the constant $e$ ($\approx 2.718$) as its base; its use is widespread in pure mathematics, especially calculus.
    • The binary logarithm uses base $b = 2$ and is prominent in computer science.
    • What would be the logarithm of ten?
    • The logarithm is denoted "logb(x)".

  • Alternating Series

    • The first fourteen partial sums of the alternating harmonic series (black line segments) shown converging to the natural logarithm of 2 (red line).

  • The Integral Test and Estimates of Sums

    • The harmonic series $\sum_{n=1}^\infty \frac1n$ diverges because, using the natural logarithm (its derivative) and the fundamental theorem of calculus, we get:

  • Integration Using Tables and Computers

    • Here are a few examples of integrals in these tables for logarithmic functions:

  • Separable Equations

    • ., combine all possible terms, rewrite any logarithmic terms in exponent form, and express any arbitrary constants in the most simple terms possible).