MthSc 119 – Slides
A
numbered proof
that the sum of two odd integers is even.
A
proof in paragraph form
of the same result. (Use paragraph form for homework.)
A
numbered proof
that the product of an integer divisible by 3 and an even integer is divisible by 6.
A
proof in paragraph form
of the same result. (Use paragraph form for homework.)
The symmetric difference of two sets.