1.

If `X={4^n-3n-1 ; n epsilonN}&Y={9(n-1):n epsilonN}` Prove that `XsubY`A. XB. YC. ND. A null set

Answer» Correct Answer - B
Let `X={(4^(n)-3n-1)|n inN}`
and `Y={9(n-1)|n inN}`
`impliesX={0,9,54,...}("By putting n = 1, 2,....)"`
and `Y={0,9,18,27,36,54,....}`
(By putting n=1, 2, …)
`therefore XuuY={0,9,18,27,36,54,....}=Y`


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