CAIE P2 2024 June — Question 2 4 marks

Exam BoardCAIE
ModuleP2 (Pure Mathematics 2)
Year2024
SessionJune
Marks4
PaperDownload PDF ↗
Mark schemeDownload PDF ↗
TopicExponential Equations & Modelling
TypeMixed exponential and e terms
DifficultyStandard +0.3 This is a straightforward exponential equation requiring taking logarithms of both sides, expanding using log laws, collecting terms in x, and solving. It's slightly above routine because it involves both exponential bases (6 and e) and requires careful algebraic manipulation, but follows a standard algorithm taught explicitly in P2 with no conceptual difficulty or problem-solving insight needed.
Spec1.06f Laws of logarithms: addition, subtraction, power rules1.06g Equations with exponentials: solve a^x = b

Use logarithms to solve the equation \(6^{2x-1} = 5e^{3x+2}\). Give your answer correct to 4 significant figures. [4]

Question 2:
AnswerMarks Guidance
22x1ln6 M1
ln53x2*M1
Attempt solution of linear equationDM1
Obtain 9.256A1 Or greater accuracy.
4
AnswerMarks Guidance
QuestionAnswer Marks
Question 2:
2 | 2x1ln6 | M1
ln53x2 | *M1
Attempt solution of linear equation | DM1
Obtain 9.256 | A1 | Or greater accuracy.
4
Question | Answer | Marks | Guidance
Use logarithms to solve the equation $6^{2x-1} = 5e^{3x+2}$. Give your answer correct to 4 significant figures. [4]

\hfill \mbox{\textit{CAIE P2 2024 Q2 [4]}}