A differential element dA is a small area on a surface that is used in calculus to approximate the total area of the surface. It is typically represented by a small rectangle or square.
Think of a differential element dA as a tiny pixel on your computer screen. Just like many pixels make up an image, many differential elements make up the total area of a surface.
Surface Area: The total area of a three-dimensional object. For example, the surface area of a cube is found by adding up the areas of all its faces.
Double Integral: An integral that calculates the volume under a curved surface in two dimensions. It involves integrating over both x and y coordinates.
Triple Integral: An integral that calculates the volume under a curved surface in three dimensions. It involves integrating over x, y, and z coordinates.
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