Take the derivative of exponential with negative power

The video tutorial explains how to find the derivative of the function y = e^(-x) + 3. It begins with an introduction to the function, followed by a step-by-step process to find its derivative. The instructor emphasizes rewriting the expression and explains the differentiation process, leading to the final result of the derivative. The lesson concludes with a recap of the key points covered.

How is the expression rewritten before taking the derivative?

What is the significance of the negative sign in the derivative?