And we are concerned with what is z prime of x. Well, once again, power rule simplifies our life. n is 2.571. So it's going to be 2.571 times x to the 2.571 minus 1 power. So it's going to be equal to, let me make sure I'm not falling off the bottom of the page, 2.571 times x to the 1.571 power. Hopefully you enjoyed that. In the next few videos, we will not only expose you to more properties of derivatives.