\( \left. \begin{array} { l } { f ( x , y , z ) = x ^ { \wedge } 2 - 2 x y + y ^ { \wedge } 2 + 3 y z - z ^ { \wedge } 2 + 4 x - 2 y + 3 x - 6 } \\ { ( 1,2,3 ) , ( 1,4,5 ) , ( 1,5,3 ) } \end{array} \right. \)
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The Deep Dive
Let's talk about the origins of multivariable functions! These functions emerge from geometry and physics in the late 19th and early 20th centuries, illuminating how multiple variables interact in space. One famous application is in physics, where they serve to describe fields, such as electromagnetic fields, helping us understand forces acting on particles in three-dimensional space. Now, when it comes to evaluating your function at different points like \( (1,2,3) \) or \( (1,4,5) \), it’s crucial to plug the values in correctly, keeping track of each variable to avoid common errors like sign mistakes or miscalculating exponents. A great tip is to double-check each step as you substitute values, ensuring your calculations flow smoothly!
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