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If X={8^n -7n-1 : n in N} and Y={49 (n-1...

If `X={8^n -7n-1 : n in N}` and Y={49 (n-1) | n `in` N}, then

A

`X sub Y`

B

`Y sub X`

C

X=Y

D

`X nn Y = phi`

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The correct Answer is:
A
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