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Subjects

Mathematics

Functions

In Class 12 Mathematics, the topic Functions develops the idea of a rule that assigns exactly one output to each element of a given set. As part of the chapter Relations and Functions, students learn to identify the domain, codomain and range, represent functions through mappings and graphs, and distinguish between one-one, many-one, into and onto functions. They also study composition of functions and the conditions under which an inverse function exists, building skills used in algebra, calculus and mathematical modelling.

Expert · Level 1 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. It is one-one
  2. It is not one-one
  3. It is onto only on positive numbers
  4. It is a constant function
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  1. It is bijective
  2. It is not one-one
  3. It is not onto
  4. It gives only a constant value
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  1. (\frac{2x+1}{x-3})
  2. (\frac{x-2}{3x+1})
  3. (\frac{3x-1}{x+2})
  4. (\frac{2x-1}{x+3})
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  1. (a=1,b=0) or (a=-1,b\in\mathbb{R})
  2. (a=0,b=1)
  3. (a=1,b\neq0)
  4. (a=2,b=0)
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  1. ([2,\infty))
  2. ([11,\infty))
  3. ((-\infty,2])
  4. (\mathbb{R})
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  1. ([2,\infty))
  2. ([0,\infty))
  3. ((-\infty,2])
  4. ({2})
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  1. ([0,1))
  2. ((0,1])
  3. ([0,1])
  4. (\mathbb{R})
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  1. (30)
  2. (60)
  3. (90)
  4. (150)
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  1. It is one-one
  2. It is not one-one because (f(-1)=f(1))
  3. It is onto but not one-one
  4. It is not defined
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  1. Range is ([0,\infty)) and it is one-one
  2. Range is ([-1,\infty)) and it is not one-one
  3. Range is (\mathbb{R}) and it is onto
  4. Range is ((0,\infty)) and it is constant
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  1. It is an even function
  2. It is an odd function
  3. It is always constant
  4. It is never defined
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  1. (\mathbb{R}\setminus{0})
  2. (\mathbb{R})
  3. ([0,\infty))
  4. (\mathbb{R}\setminus{1})
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  1. ([2,\infty))
  2. ((2,\infty))
  3. (\mathbb{R})
  4. ((-\infty,2])
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  1. (p=-4,q=9)
  2. (p=4,q=-3)
  3. (p=-2,q=7)
  4. (p=2,q=1)
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  1. No real (m)
  2. Only (m=1)
  3. Only (m=-1)
  4. Every (m\neq0)
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  1. (3)
  2. (-3)
  3. (1)
  4. (-1)
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  1. It is bijective
  2. It is not one-one
  3. It is not onto
  4. It is constant
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  1. (2x)
  2. (2x+1)
  3. (x^2+1)
  4. (0)
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  1. (\frac{1}{f(x)})
  2. (f(x))
  3. (-f(x))
  4. (0)
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  1. (8)
  2. (15)
  3. (3)
  4. (5)
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  1. (\frac{1}{2})
  2. (0)
  3. (1)
  4. No minimum value
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  1. ([0,4])
  2. ([0,4))
  3. ((0,4])
  4. (\mathbb{R})
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  1. It is bijective
  2. It is not one-one
  3. It is not onto
  4. It gives only positive values
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  1. (2)
  2. (-2)
  3. (4)
  4. (16)
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  1. (f) is one-one
  2. (g) is one-one
  3. Both are onto
  4. (f) is constant

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