https://drive.google.com/file/d/1RkcRuHw9gYrjypGJV3bNixWTb-ZOSY9f/view?usp=share_link
https://drive.google.com/file/d/1Mw9tMYDou_4_W-1D1ij_SK6Ed9RBxSkQ/view?usp=share_link
https://www.youtube.com/watch?v=Mp_5-KUKr-g
A double integral is a type of integral that extends the concept of a standard one-dimensional integral to two dimensions. It is used to calculate the area under a two-dimensional surface or volume within a given region of the x-y plane.
The double integral is denoted by the symbol ∬ and is represented by an iterated integral. The integrand is a function of two variables, f(x, y), and the limits of integration are specified for both variables. The limits of integration define the region of integration, which can be a rectangular region, a circular region or any other shape.