Question types

Relations and Functions question types

71 questions across 7 question groups — pick any mix to generate a MATHS paper with step-by-step answer keys.

71
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7
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5
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Sample Questions

Relations and Functions questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Let $\text{f(x)}=\sqrt{1+\text{x}^2}$ then.

  1. $\text{f(xy)} = \text{f(x)}.\text{f(y)}$

  2. $\text{f(xy)} \geq \text{f(x)}.\text{f(y)}$

  3. $\text{f(xy)} \leq \text{f(x)}.\text{f(y)}$

  4. None of these

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Let n(A) = m, and n(B) = n. Then the total number of non-empty relations that can be defined from A to B is.

  1. mn
  2. nm - 1 
  3. mn - 1
  4. 2mn - 1
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The domain and range of real function f defined by $\text{f(x)}=\sqrt{\text{x}-1}$ is given by.

  1. Domain $= [1, \infty),$ Range $= [0, \infty)$

  2. Domain $= [1, \infty),$ Range $= [0, \infty)$

  3. Domain $= [1, \infty),$ Range $= [0, \infty)$

  4. Domain $= [1, \infty),$ Range $= [0, \infty)$

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The domain of the function f defined by $\text{f(x)}=\sqrt{4-\text{x}}+\frac{1}{\sqrt{\text{x}^2-1}}$ is equal to.

  1. $(–\infty, –1) \cup (1, 4]$

  2. $(–\infty, –1] \cup (1, 4]$

  3. $(–\infty, –1) \cup [1, 4]$

  4. $(–\infty, –1) \cup [1, 4)$

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If A = {1, 2, 3}, B = {3, 4} and C = {4, 5, 6}, then $(\text{A} × \text{B})\cup (\text{A} × \text{C})$
= {(1, 3), (1, 4), (1, 5), (1, 6), (2, 3), (2, 4), (2, 5), (2, 6), (3, 3), (3, 4), (3, 5), (3, 6)}.
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Q 263 Marks Question3 Marks
If$\text{A}= \big\{\text{x} : \text{x}\in\text{W}, \text{x}\in2\big\},$$\text{B}= \big\{\text{x} : \text{x}\in\text{N},1< \text{x} < 5\big\},$$\text{C}=\big\{3, 5\big\}$ find.
  1. $\text{A}\times(\text{B} \cap \text{C}) $
  2. $\text{A}\times(\text{B} \cup \text{C}) $
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Let f = {(2, 4), (5, 6), (8, – 1), (10, – 3)}
g = {(2, 5), (7, 1), (8, 4), (10, 13), (11, 5)}
be two real functions. Then Match the following:
Column IColumn II
(a)$​​\text{f}-\text{g}$(i)$\Big\{\Big(2, \frac{4}{5}\Big), \Big(8, \frac{-1}{4}\Big), \Big(10, \frac{-3}{13}\Big)\Big\}$
(b)$\text{f}+\text{g}$(ii)$\{(2, 20), (8, -4), (10, -39)\}$
(c)$\text{f}\times\text{g}$(iii)$\{(2, 1), (8, -5), (10, -16)\}$
(d)$\frac{\text{f}}{\text{g}}$(iv)$\{(2, 9), (8, 3), (10, 10)\}$
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Is g = {(1, 1), (2, 3), (3, 5), (4, 7)} a function? Justify. If this is described by the relation, $\text{g(x)} = \alpha\text{x} + \beta,$ then what values should be assigned to $\alpha$ and $\beta?$
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