SOLUTION: Please show work. Set A = (-3, 3) and set B = [-3, 3] Find a) A∩B b) A∪B

Algebra ->  Real-numbers -> SOLUTION: Please show work. Set A = (-3, 3) and set B = [-3, 3] Find a) A∩B b) A∪B       Log On


   

Question 1014444: Please show work.
Set A = (-3, 3) and set B = [-3, 3]
Find a) A∩B b) A∪B
Answer by josgarithmetic(39629) About Me  (Show Source):
You can put this solution on YOUR website!
Pay attention to exactly what the interval notations say and what the set statements say;
A does NOT include the two boundary numbers but set B does include them.

(a)
A INTERSECTED with B is just set A; the values BETWEEN the the two boundaries are common to A and B.

(b)
A UNITED with B is set B; the union of the two sets, so this will INCLUDE the boundary values.