if X = {\(8^n-7n-1/n \in N\)} and Y = {\(49(n-1)/n \in N\)}, then
If A={x:x=4 power n minus 3n minus 1 and n belongs to mode of N } and B = {y:y = 9(n -1) and n belongs to mode of N } Prove that A subset of B
If X = {4n - 3n - 1 : n ∈ N} and Y = { 9(n-1) : n ∈ N}, then X ∪ Y is equal to