2.18

线性化与近似

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$$\rightleftharpoonup{xx}$$ $$\longleftharp{xx}$$, $$\longrightharp{xx}$$,

线性化是一种数学技术,用于在选定参考点附近用更为简单的线性模型近似复杂的非线性函数。该方法基于这样一种思想:尽管函数本身可能难以精确求值,但其在某一特定输入值附近的局部行为,通常可以通过该点处的切线进行近似。当研究对象涉及相对于已知值的微小偏差时,线性化方法尤为有效。

以平方根函数为例,其在自变量取值…

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