If U={x:x is a natural number<7},B={2,3,5} and C={1,2,3,6},then find B'-C'

If A={x:x is a natural number multiple of 3} and B={x:x is a natural number less than 6} then A∩B.

D = {x : x is a prime number E = {x : x is a natural number divisible by 3 and less than 15} F = {x: x is an odd natural number less than 18). Find D uu F

D = {x : x is a prime number E = {x : x is a natural number divisible by 3 and less than 15} F = {x: x is an odd natural number less than 18). Find E uu F

D = {x : x is a prime number E = {x : x is a natural number divisible by 3 and less than 15} F = : {x is an odd natural number less than 18). Find D uu E

D = ix : x is a prime number E = {x : x is a natural number divisible by 3 and less than 15} F = : xis an odd natural number less than 18). Find D nn E

D = ix : x is a prime number E = {x : x is a natural number divisible by 3 and less than 15} F = : xis an odd natural number less than 18). Find D nn F

D = ix : x is a prime number E = {x : x is a natural number divisible by 3 and less than 15} F = : xis an odd natural number less than 18). Find E nn F

D = ix : x is a prime number E = {x : x is a natural number divisible by 3 and less than 15} F = : xis an odd natural number less than 18) verify D uu (E uu F)=(D uu E)uuF and (D nn E) nn F=D nn(EnnF)

If A = {2x : x is a natural number le6 } and B = {3x : x is a natural number le 5 } Prove that (B-A) uu B=B

If A = {2x : x is a natural number le6 } and B = {3x : x is a natural number le 5 } Prove that A-(A-B)=A nn B