# CMTH110 - Solutions08.pdf - CMTH 110 u2013 Assignment...

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CMTH 110 – Assignment 8 (solutions) 1. (Exercise 15 in 4.2) Prove that the product of any two rational numbers is a rational number.
2. (Exercise 33 in 6.1) Find a) P ( ), b) P ( P ( )), c) P ( P ( P ( ))).
3. (Exercise 17 in 6.2) Prove the following statement: For all sets A, B and C , if A C and B C then A B C .
4. (Exercise 7 in 6.3) Is the following statement true or false? If it is true, prove it; otherwise, give a