Chapter 2.3B, Problem 1A

Assessment

If $W=\left\{0,1,2,3,\mathrm{.......}\right\}$, $A=\left\{x|x=2n+1\text{and}n\in W\right\}$, $B=\left\{x|x=2n\text{and}n\in W\right\}$, and $N=\left\{1,2,3,\mathrm{.....}\right\}$, find the simplest possible expression for each of the following,

a. $W-A$

b. $A\cap B$

c. $W\cap N$

d.