JEE MATHEMATICS MCQ: SET THEORY

1 Easy

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Analyzing +4 | -1

X = \left\{ {{4^n} - 3n - 1\;:n \in N} \right\}

and

Y = \left\{ {9\left( {n - 1} \right):n \in N} \right\},

then

X \cup Y

is equal to

View answer and explanation

Correct option: B

Y

Option B (Y) is correct because every element of X is also an element of Y, meaning X is a subset of Y, and therefore the union of X and Y is Y.

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2 a_1 a_2 a_3 \ldots . . a_{2006}

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S

a N=\{a n: n \in N: b N=\{n b: n \in N\}

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\}

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A-B

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n

[\mathrm{F}(20) \cap \mathrm{F}(16)] \subseteq \mathrm{F}(\mathrm{y})

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A, 20 \%

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A

C

4 \%

A

C

2 \%

A