In this video, we break down the solution for Question 7 (Parts a and b) from the 2017 CSS Pure Mathematics past paper, which delves into the proof of the Cauchy-Riemann equations in complex analysis. This important topic is crucial for students preparing for the CSS exam, particularly those studying complex functions and analytic conditions. The Cauchy-Riemann equations are key to determining whether a complex function is analytic, and this video will help you understand the theory behind these equations, as well as how to apply them to solve problems. We will provide a clear and step-by-step explanation of the proof of the Cauchy-Riemann equations, outlining each part of the process. Additionally, we will solve an example where a given function is shown not to be analytic by demonstrating how the Cauchy-Riemann equations fail to hold. This will be an essential guide for anyone preparing for the CSS Pure Mathematics exam or interested in mastering complex analysis. What’s Covered: Cauchy-Riemann Equations: Proof and Explanation Example Problem: Determining if a Function is Analytic When the Cauchy-Riemann Equations Do Not Hold Applications of Complex Functions and Analyticity Step-by-Step CSS Pure Mathematics Problem Solving This video is designed to help you understand and apply the Cauchy-Riemann equations, an essential concept in complex analysis. Whether you’re studying for the CSS exam or deepening your understanding of complex analysis, this solution will guide you through both theory and practical applications. 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