Moderate -0.3 This is a straightforward exponential equation requiring multiplication to clear the fraction, rearrangement into a quadratic in e^x, and solving. The technique is standard for P3 level with no conceptual difficulty beyond recognizing the substitution method, making it slightly easier than average.
Rearrange the equation in the form ae2x =b or aex =be−x
M1
Obtain correct equation in either form with a = 2 and b = 5
A1
Use correct method to solve for x
M1
Obtain answer x = 0.46
A1
4
Answer
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Guidance
Question
Answer
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Question 2:
2 | Rearrange the equation in the form ae2x =b or aex =be−x | M1
Obtain correct equation in either form with a = 2 and b = 5 | A1
Use correct method to solve for x | M1
Obtain answer x = 0.46 | A1
4
Question | Answer | Marks | Guidance