1. If A and B are disjoint sets and n (4) = 2, n (B) = 3, then n(A × B) = ........... .

Question

Fill in the Blanks

1. If A and B are disjoint sets and n (4) = 2, n (B) = 3, then n(A × B) = ............. .

2. The domain of f(x) = √x + 7 = ............. .

3. If (4x + 3, y) = (3x + 5, - 2), then value of x is ........... .

4. If R= {(2, 3) (\(\frac{1}{2}, 0\)) (2, 7) (- 4, 6)} then range of R is ........... .

5. For any set A, A × Φ is ............ .

Answer 1

1. If A and B are disjoint sets and n (4) = 2, n (B) = 3, then n(A × B) = 6.

2. The domain of f(x) = √x + 7 = [- 7, ∞].

3. If (4x + 3, y) = (3x + 5, - 2), then value of x is 2.

4.  If R= {(2, 3) (\(\frac{1}{2}, 0\)) (2, 7) (- 4, 6)} then range of R is {0, 3, 6, 7}.

5. For any set A, A × Φ is Φ.