Question

Prove the following statements by contraposition (or directly if you prefer or are able to)

Answer 1

`Preposition:\text{ if }(1)/(r)\text{ is irrational, then }r\text{ is irrational}`
`proof:\text{ suppose }(1)/(r)=(1)/(√(p))`

where square root of 'p' is not a perfect square

`Thus:\text{ }r=√(p)`
`\text{ Therefore}:r\text{ is irrational}`