代数示例

$f (x) = \frac{\cos (2 x) - \cos (x)}{x^{2}}$

解题步骤 1

图像。

$f (x) = \frac{\cos (2 x) - \cos (x)}{x^{2}}$

解题步骤 2

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$