Chartrand, Polimeni, Zhang - Mathematical Proofs - A Transition to Advanced Mathematics (3nd Edition) Excercise 9
There is document - Chartrand, Polimeni, Zhang - Mathematical Proofs - A Transition to Advanced Mathematics (3nd Edition) Excercise 9 available here for reading and downloading. Use the download button below or simple online reader.
The file extension - PDF and ranks to the Documents category.