Consider the sets of values.
A = {x: - infinity < x < 3}
B = {x:3<x< infinity}
C = {x:x=-3,3}
Find = ( A intersect b ) union C.
Would this be somthing like A = numbers between -3 and negative infinity
b = numbers between 3 and positive infinity
and c = numbers between -3 and 3?
So a intersect b is any number between -3 and 3 and c union ( a intersect b ) is again between -3 and 3?
Sorry this is supposed to be
a = {negative infinity < x < 3}
b = {-3 < x < infinity.}
c ={ x = -3 , 3}
So as i see it , a intersect b = {-3<x<3}
a intersect b includes all numbers between -3 and 3 but not -3 and 3 themselves.
And since c includes only the values -3 and 3 , the union on (a intersect b) union c = nothing.???
Is this correct?