Step-by-Step Lesson

Learn: Proof by Contradiction

Edexcel 9MA0 A-Level Mathematics

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Steps in this lesson (11)

1
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Match the items on the left with their correct pairs on the right

2
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Match the items on the left with their correct pairs on the right

3
Multiple ChoiceInteractive

What is the key idea behind proof by contradiction?

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4
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Match the items on the left with their correct pairs on the right

5
Fill in the BlankInteractive

Proof by contradiction involves assuming the {{blank0}} of the statement and showing it leads to a {{blank1}}.

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6
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Match the items on the left with their correct pairs on the right

7
Multiple ChoiceInteractive

In the proof that √2 is irrational, why does the assumption that √2 is rational lead to a contradiction?

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8
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Match the items on the left with their correct pairs on the right

9
MatchingInteractive

Match the items on the left with their correct pairs on the right

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10
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Match the items on the left with their correct pairs on the right

11
Multi-SelectInteractive

Which of the following describes proof by contradiction? (Select all that apply)

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