If A=3n:n∈N,n≤6,B=9n:n∈N,n≤4 then which of the following is false

A={3,9,27,81,243,729},B={9,81,729,6561}A∪B={3,9,27,81,243,729,6561}A∩B={9,81,729}A~B={3,27,243}B~A={6561}AΔB=(A~B)∪(B~A)={3,27,243,6561}