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3.1.1 Proof (A-level only)

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Question 72

Use proof by contradiction to show that for all real values of $x$ ,

6)^2 \geq 2x - 46

[3]

ii.

Show that the following statement is untrue:

" $2^n + 2n - 1$ is a prime number for all values of $\in \mathbb{Z}^{+}$ ."

[3]

Markscheme

3.1.1 Proof (A-level only) Questions

A Level
Maths
3.1.1 Proof (A-level only)

107 exam-style questions on WJEC A Level Maths 3.1.1 Proof (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

3.1.1 Proof (A-level only)

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3.1.1 Proof (A-level only)

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Question 72

Use proof by contradiction to show that for all real values of $x$ ,

6)^2 \geq 2x - 46

[3]

ii.

Show that the following statement is untrue:

" $2^n + 2n - 1$ is a prime number for all values of $\in \mathbb{Z}^{+}$ ."

[3]

Markscheme

3.1.1 Proof (A-level only) Questions

A Level
Maths
3.1.1 Proof (A-level only)

107 exam-style questions on WJEC A Level Maths 3.1.1 Proof (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.