Edexcel Paper 1 2020 October — Question 8

Exam BoardEdexcel
ModulePaper 1 (Paper 1)
Year2020
SessionOctober
TopicDifferential equations

  1. A new smartphone was released by a company.
The company monitored the total number of phones sold, \(n\), at time \(t\) days after the phone was released. The company observed that, during this time,
the rate of increase of \(n\) was proportional to \(n\)
Use this information to write down a suitable equation for \(n\) in terms of \(t\).
(You do not need to evaluate any unknown constants in your equation.)