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+1 vote
3.4k views
in Sets, Relations and Functions by (49.0k points)
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If X = {8n – 7n – 1 | n ∈ N} and Y = {49n – 49 | n ∈ N}. Then

A. X ⊂ Y

B. Y ⊂ X 

C. X = Y

D. X ∩ Y = ϕ

1 Answer

+4 votes
by (47.4k points)
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Best answer

A. X  Y

Given: X = {8n – 7n – 1 | n ∈ N} and Y = {49n – 49 | n ∈ N}

X = {8n – 7n – 1 | n ∈ N}

On putting n = 1, 2, 3….

X = {0, 49, 490………}

Y = {49n – 49 | n ∈ N}

On putting n = 1, 2, 3, 4,….,11,…

Y = {0, 49, 98, 147,………, 490………}

Clearly, X  Y

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