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Exponentials and Logarithms

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Question 82

Verify that y=ln⁡(52)\displaystyle y=\ln\left(\frac{5}{2}\right)y=ln(25​) and y=ln⁡3y=\ln 3y=ln3 are solutions of the equation

2ey+15e−y=11 2e^y + 15e^{-y} = 11 2ey+15e−y=11
[5]
Markscheme

Exponentials and Logarithms Questions

  1. A Level
  2. /Maths
  3. /Exponentials and Logarithms

277 exam-style questions on Edexcel A Level Maths Exponentials and Logarithms, covering 14.1 Exponential Functions, 14.2 y = e^x, 14.3 Exponential Modelling, 14.4 Logarithms, 14.5 Laws of Logarithms, 14.6 Solving Equations using Logarithms, 14.7 Working with Natural Logarithms, and 14.8 Logarithms and Non-Linear Data. Each one has a worked solution and a mark scheme showing where the marks go.

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