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Ask by Valdez Stuart. in Peru
Dec 17,2024

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Answer

Para resolver la integral doble
cambia el orden de integración y evalúa la integral interna. La integral no tiene una solución elemental y debe ser calculada numéricamente.

Solution

Para resolver la integral doble
primero observamos que la región de integración está definida por y . Esta región corresponde a la parte superior del primer cuadrante del círculo de radio 1.
Podemos cambiar el orden de integración. Primero, determinamos los límites para y . Para un valor fijo de , puede variar desde hasta . Por lo tanto, los nuevos límites de integración son:
Ahora, resolvemos la integral interna:
Para resolver esta integral, podemos usar el cambio de variable , lo que implica que o . Cuando , y cuando , . Entonces, la integral se convierte en:
Sin embargo, esta integral no tiene una solución elemental. Por lo tanto, podemos dejar la integral en su forma original y evaluarla numéricamente o mediante métodos de aproximación.
Finalmente, la integral original se puede expresar como:
é
Si necesitas un valor numérico específico, se puede calcular utilizando métodos numéricos como la cuadratura.

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Bonus Knowledge

To tackle the double integral , it’s helpful to recognize the symmetry and the bounds involved. The integrand involves , which hints at a possible polar coordinate substitution since it relates nicely to the distance from the origin.
Converting to polar coordinates where and , we observe that the region described by the bounds corresponds to the quarter-circle in the first quadrant. In polar coordinates, the Jacobian is , which gives us:
This integral will be easier to solve since it separates into two parts: the angle and the radius. The r integral can be computed, and then we can multiply by the integral bounds. Now, let’s integrate the radius part:
  1. Calculate the inner integral:
Using substitution gives . Thus the limits for to transform to to , resulting in:
  1. Multiply by the outer integral, which evaluates simply to:
  1. Combine the results to yield:
Thus, the value of the original double integral is:

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