Questions and Solutions

Class: 12 Subject: Math Type: Mcq Year: 2022

Question 1:

If \(f(x) = \frac{1}{x}\), then \(f(f(x)) =\)

  • A. x
  • B. 1
  • C. \(\frac{1}{x^2}\)
  • D. -x
Class: 12 Subject: Math Type: Mcq Year: 2022

Question 2:

The function \(f(x) = x^2 + 2x + 3\) is:

  • A. one-one
  • B. onto
  • C. many-one
  • D. bijective
Class: 12 Subject: Math Type: Mcq Year: 2022

Question 3:

Let \(f: \mathbb{R} \to \mathbb{R}\) be defined by \(f(x) = x^2 - 1\). Then \(f^{-1}(f(2))\) is:

  • A. \{-2, 2\}
  • B. \{2\}
  • C. \{3\}
  • D. \{-3\}