Vector Algebra - Math
A vector V in the plane or in space is an arrow: it is determined by its length, denoted ... figure 13.1). We use vectors to represent entities which are described by magnitude and direction. For example, a force applied at a point is a vector: it is completely determined by the magnitude of the force and the ... which lies on the tangent line ...
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Systems of Differential Equations - Math
www.math.utah.edu522 Systems of Differential Equations Let x1(t), x2(t), x3(t) denote the amount of salt at time t in each tank. We suppose added to tank A water containing no salt. Therefore, the salt in all the tanks is eventually lost from the drains.
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