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Standard IX

Mathematics

Union of Sets

If A is a sub...

Question

If A is a subset of B, then A ⋃ B ___.

equals A

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equals B

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equals phi

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is a subset of A

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Solution

The correct option is B
equals B

B

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Similar questions

Q. If

A \cap B - B

, then
(a)

A \subset B

(b)

B \subset A

(c)

A = Φ

(d)

B = Φ

Q. Let

A = \{ϕ, \{ϕ\}, 1, \{1, ϕ\}, 2\}

. Which of the following are true?
(i)

ϕ \in A

(ii)

\{ϕ\} \in A

(iii)

\{1\} \in A

(iv)

\{2, ϕ\} \subset A

(v)

2 \subset A

(vi)

\{2 \{1\}\} ⊄ A

(vii)

\{\{2\}, \{1\}\} ⊄ A

(viii)

\{ϕ, \{ϕ\}, \{1, ϕ\}\} \subset A

(ix)

\{\{ϕ\}\} \subset A

Let A = {1, 2, {3, 4}, 5}. Which of the following statements are incorrect and why?

(i) {3, 4} $\subset$ A (ii) {3, 4} $\in$ A

(iii) {{3, 4}} $\subset$ A (iv) $1 \in A$

(v) $1 \subset A$ (vi) {1, 2, 5} $\subset$ A

(vii) {1, 2, 5} $\in$ A (viii) {1, 2, 3} $\subset$ A

(ix) $Φ \in A$ (x) $Φ \subset A$

(xi) { $Φ$ } $\subset$ A.

Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why?

(i) {3, 4}⊂ A

(ii) {3, 4}}∈ A

(iii) {{3, 4}}⊂ A

(iv) 1∈ A

(v) 1⊂ A

(vi) {1, 2, 5} ⊂ A

(vii) {1, 2, 5} ∈ A

(viii) {1, 2, 3} ⊂ A

(ix) Φ ∈ A

(x) Φ ⊂ A

(xi) {Φ} ⊂ A

Q. Let A= {1, 2, {3, 4,}, 5}. Which of the following statements are incorrect and why? (i) {3, 4}⊂ A (ii) {3, 4}}∈ A (iii) {{3, 4}}⊂ A (iv) 1∈ A (v) 1⊂ A (vi) {1, 2, 5} ⊂ A (vii) {1, 2, 5} ∈ A (viii) {1, 2, 3} ⊂ A (ix) Φ ∈ A (x) Φ ⊂ A (xi) {Φ} ⊂ A

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If A is a subset of B, then A ⋃ B ___.

The correct option is B equals B B

The correct option is B
equals B

B