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3.5.2 Differentiation (A-level only)

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Question 17

A scientist models the activity, AAA MBq, of a radioactive isotope over time, ttt days, using the equation

A=(15t+2)e−0.4t,t≥0 A = (15t + 2)e^{-0.4t}, \quad t \ge 0 A=(15t+2)e−0.4t,t≥0

Find, using calculus, the exact value of ttt for which the activity is stationary.

[4]
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3.5.2 Differentiation (A-level only) Questions

  1. A Level
  2. /Maths
  3. /3.5.2 Differentiation (A-level only)

109 exam-style questions on CCEA A Level Maths 3.5.2 Differentiation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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