Skip to content

Course home

Sign up

1.1 Proof by Contradiction

EasyMedium
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182
Question 55

A theoretical chemist determines that a specific bond length LLL is an irrational number. In a molecular model, they define an effective length EEE by scaling LLL by a known non-zero rational factor κ\kappaκ, such that E=κLE = \kappa LE=κL.

Prove by contradiction that the effective length EEE must be an irrational number.

[5]
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.

Question bank