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  • If X equals {8 power n minus 7n minus 1 | n in N} and Y equals {49n minus 49 | n in N}. Then X subset Y (B) Y subset X (C) X equals Y (D) X intersection Y equals phi

If X = \{8^n-7n - 1 : n\in N\}} and Y = \{49n-49 : n\in N\}. Then
(A) X\subset Y   (B) Y\subset X   (C) X = Y    (D) X\cap Y = \phi
 

Answers (1)

The answer is the option (a). 

Given that X = \{8^n-7n - 1 : n\in N\} = \{0, 49, 490,...\}

And Y = \{49n-49 : n\in N\} = \{0, 49, 98,...\}

Here, it is clear that every element belonging to the X is also present in Y.

X\subset Y. Hence, the correct option is (A).

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infoexpert22

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