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Let $S$ be the surface of the portion of the solid sphere $x^{2}+y^{2}+z^{2} \leq a^{2}$ that lies in the first octant and let $f(x, y, z)=\ln \sqrt{x^{2}+y^{2}+z^{2}} .$ Calculate $$\iint_{S} \nabla f \cdot \mathbf{n} d \sigma$$ $(\nabla f \cdot \mathbf{n} \text { is the derivative of } f \text { in the direction of outward normal } \mathbf{n} .)$

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Calculus 3

Chapter 16

Integrals and Vector Fields

Section 8

The Divergence Theorem and a Unified Theory

Vector Functions

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Lectures

03:04

In mathematics, a function is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output. An example is the function that relates each real number x to its square x. The input of a function is called the argument and the output is called the value. The set of all permitted inputs is called the domain of the function. Similarly, the set of all permissible outputs is called the codomain. The most common symbols used to represent functions in mathematics are f and g. The set of all possible values of a function is called the image of the function, while the set of all functions from a set "A" to a set "B" is called the set of "B"-valued functions or the function space "B"["A"].

08:32

In mathematics, vector calculus is an important part of differential geometry, together with differential topology and differential geometry. It is also a tool used in many parts of physics. It is a collection of techniques to describe and study the properties of vector fields. It is a broad and deep subject that involves many different mathematical techniques.

12:57

Outward flux of a gradient…

04:15

Evaluate the integral $\ii…

02:03

08:13

Evaluate the surface integ…

03:14

Show that if $\mathbf{F}$ …

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