1. Let U= R , A= [7,10 ]= {x|7 <=x<= 10},
B= (8, 11)= {x|8< x < 11}, and
C= {9, 10}. Calculate:
a. A-B= [7,8]
b. AUB= [7,11)
c. AnB= (8,10]
d. Find the power set of C, P'(C).P'(C)= {Ø, {9},{10} {9,10}}
e. Find the complement of B, B'. B'= (-inf, 8] U [11, inf)

2. Let A= [1 2
3 4
-1-2],
Let B= [-2 -1
1 2
0 0],
Let C= [2 3 -1
4 0 5],
Let D= [1 1
0 1],
Let E= [0 1
1 1],
Find A+B= [-1 1
4 6
-1-2]
BC= # of columns in first matrix = # rows in 2nd matrix across and down.
=[-8 -6 -3
10 3 9
0 0 0]
(-2)(2)+(-1)(4)
(-4)+(-4)=-8
(-2)3+(-1)(0)=-6
(-2)-1+(-1)(5)= -3,
2+8= 10
3+0= 3
-1+10=9