51 A level Mathematics Edexcel Paper 1 2018 Q7 Part b)

In this video, we tackle question 7, specifically part B, where the objective is to demonstrate that a given integral is inversely proportional to k. We begin by rewriting the integral with its limits and then proceed with the integration process. The integration involves treating the expression as a power function, adjusting the exponent, and accounting for the derivative of the inner function. After applying the limits of integration, we simplify the resulting expression. The core of the solution lies in manipulating the final form of the integral to explicitly show its inverse relationship with k, thereby proving the desired proportionality. Visit AxiomTutoring.com and subscribe to @AxiomTutoringCourses for more math tutorials.