Let A 124500655143 List the elements in each of the followi

Let A = {(-1,2),(4,5),(0,0),(6,-5),(5,1),(4,3)}. List the elements in each of the following sets:

1. {a + b: (a,b) A}

2. {a: a > 0 and (a,b) A}

3. {b: b = k^2 for some k Z and (a,b) A for some a}

Solution

1.{1,9,0,6,7}

2.{4,5}

3.{0,1}