Kategoriarkiv: Calculus

Pythonkod för beräkning av integraler med rektangelmetoden

Posted on mars 18, 2018 by

#I koden nedan är det bara att ändra y i funktionen f(x) till den funktion man skall integrera. #Rektangelmetoden from math import * def f(x): y = x * log(x) return y print (”Numerisk beräkning av integral”) a = float(input(”Nedre … Läs mer →

Publicerat i Calculus, matematik 3c, matematik 4, Pythonprogrammering, Uncategorized | Märkt , , | Lämna en kommentar

l´Hôpital’s rules

Posted on oktober 8, 2013 by

sin(x)/x = 1 when x approaches infinity. Direct substitution of x=0 gives the indeterminate form 0/0. The limit of an indeterminate form can be any number. For instance kx/x= 0 , |x|/x2= &inf; as x tends towards infinty. Many indeteminate … Läs mer →

Publicerat i Calculus, matematik 3c, matematik 4 | Märkt , | 3 kommentarer

Rotationskroppar

Posted on september 26, 2013 by

Ett elegant sätt att beräkna volymen av kroppar som genereras av en känd funktion s.k. rotationskroppar, är med hjälp av tvärsnittsformeln. Tanken är att en kurva med känd funktion y=f(x) roteras runt en av koordinataxlarna och därvid genereras en rotationskropp. … Läs mer →

Publicerat i Calculus, Gymnasiefysik(high school physics), matematik 4 | Märkt , | Lämna en kommentar

Lagrangian mechanics

Posted on augusti 5, 2013 by

In functional analysis the variable itself is a function. This is used e.g. in the Lagrangian formulation of mechanics where one derives the Lagrangian i.e. L = kinetic energy – potential energy. The variables, or degrees of freedom, can be … Läs mer →

Publicerat i Calculus, Fysik 2, Mathematical physics | Märkt , , | Lämna en kommentar

Spherical harmonics

Posted on maj 12, 2013 by

The spherical harmonics are functions describing the angular dependence of many physical problems e.g solutions to the Schrödinger equation for the hydrogen atom. If the latitiude is denoted by v and x= cosv then  the equation is (d/dx){(1 – x2)dPndx} … Läs mer →

Publicerat i Calculus | Märkt , , | Lämna en kommentar

Thermodynamics 2 Entropy

Posted on januari 10, 2013 by

A collection of rembrandts self-portraits serve as an illustration of the passage of time When left to itself snow spontaneously would never build a snowman. It will only form different kinds of heaps . This can be undestood as the … Läs mer →

Publicerat i Calculus, Gymnasiefysik(high school physics), Thermodynamics | Märkt , | Lämna en kommentar

MacLaurin-polynomials

Posted on december 12, 2012 by

→Taylor-expansion is a method of approximating a function f(x) around a point a with a polynomial of the argument x in the vicinity of a. The polynomial itself consists of the derivatives of the function of various orders. Tn(x) = … Läs mer →

Publicerat i Calculus, Gymnasiematematik(high school math) | Märkt , | Lämna en kommentar

Integration by parts

Posted on december 4, 2012 by

Integration by  parts can be regarded as the inverse to the product rule for differentiation. Suppose U(X) and V(x) are  two differentiable functions. According to the product rule dU(x)V(x)/dx = U(x) dV(x)/dx + V(x)dU(x)/dx = U(x) dV(x)/dx+ V(x)dU(x)/dx Integrating both … Läs mer →

Publicerat i Calculus, Gymnasiematematik(high school math), matematik 4 | Märkt , | Lämna en kommentar

Techniques of integration

Posted on november 29, 2012 by

If the primitive function of an integrand can be found it is always best to take advantage of the fundamental theorem of calculus. In order to be able to determine integrals whose indefinte integrals(primitive functions)  cannot be found immediately some … Läs mer →

Publicerat i Calculus, Gymnasiematematik(high school math), matematik 4 | Märkt , , | Lämna en kommentar

Complex integral solved with Cauchy’s integral formula

Posted on november 6, 2012 by

Arfken 6.4.4Arfken 6.4.4

Publicerat i Calculus, Imaginary numbers, Uncategorized | Märkt , | Lämna en kommentar