微积分学示例

$lim_{x \to 9} \sqrt{x^{2} - 81}$

解题步骤 1

Because there is a gap in the domain of $\sqrt{x^{2} - 81}$ to the left of $9$ , the limit does not exist.

$不存在$

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