1.1 Proof by Contradiction

Use proof by contradiction to prove that $5\sqrt{5}$ is irrational.

(You may assume that if $n$ is an integer and $n^2$ is a multiple of 5, then $n$ is a multiple of 5).

[6]

Use proof by contradiction to prove that $5\sqrt{5}$ is irrational.

(You may assume that if $n$ is an integer and $n^2$ is a multiple of 5, then $n$ is a multiple of 5).

[6]

1.1 Proof by Contradiction Questions