Answer:
Step-by-step explanation:
Let x be the number.
4x -8 < 56
x ={ ........-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
Yes The intersection of any two disjoint sets is a null set
if two sets do not have any common element then their intersection does not have any element Therefore its intersection is a null set