1.1.4 Proof by contradiction (A-level only)

80%

Use proof by contradiction to show that there exist no integers $x\,$ and $y\,$ for which $4 x + 8 y = 5$ .

[4]

80%

Use proof by contradiction to show that there exist no integers $x\,$ and $y\,$ for which $4 x + 8 y = 5$ .

[4]

1.1.4 Proof by contradiction (A-level only) Questions