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1.1 Proof by Contradiction

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Question 38

The voltage VVV in an electrical circuit is modeled by the function

V(t)=5t+19t9+2cos⁡t V(t) = 5t + \frac{1}{9}t^9 + 2\cos t V(t)=5t+91​t9+2cost

for t∈Rt \in \mathbb{R}t∈R, where ttt is the time in seconds. Use proof by contradiction to prove that the voltage function has no stationary points.

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Markscheme

1.1 Proof by Contradiction Questions

  1. A Level
  2. /Maths
  3. /1.1 Proof by Contradiction

107 exam-style questions on Edexcel A Level Maths 1.1 Proof by Contradiction. Each one has a worked solution and a mark scheme showing where the marks go.

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