Precalculus Examples

$\sum_{9}^{4} 8$

Step 1

Since the summation's lower limit is greater than the summation's upper limit, it is an empty summation and its value is defined to be zero.

$0$

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