# NCERT Solutions for Class 12 Maths Chapter 1 Exercise 1.2

NCERT Solutions for Class 12 Maths Chapter 1 Exercise 1.2 Relations and Functions in Hindi Medium as well as English Medium for all boards using NCERT Books as a course books, updated for session 2020-2021.

Solutions are applicable for CBSE Board, UP Board – intermediate (Senior Secondary), Bihar Board, Uttarakhand board, Madhya Pradesh (MP Board) and the other state boards also which are following NCERT Books in Secondary and Senior Secondary Education.## NCERT Solutions for Class 12 Maths Chapter 1 Exercise 1.2

Class: | 12 |

Subject: | Maths |

Chapter 1: | Exercise 1.2 |

### 12th Maths Exercise 1.2 Solutions

NCERT Solutions for Class 12 Maths Chapter 1 Exercise 1.2 Relations and Functions in English & Hindi Medium for CBSE, Madhya Pradesh Board, UP Board, Bihar Board, Uttarakhand and all other board using NCERT Books 2020-21. Download Offline Apps based on latest CBSE Syllabus for new session. Join the discussion forum to solve your doubts related to NIOS or CBSE Board.

### Exercise 1.2 Solutions in Hindi & English

#### About 12 Maths Exercise 1.2

In Exercise 1.2, the questions are based on concept of one – one, onto, injective, surjective, bijective, invertible function, etc. If the function is invertible, then we have to find inverse also. If for each element in domain, there is one and only one element in co-domain, then it is called one-one. Similarly, if for each element in range, there is one and only one element in domain, then it is onto. When a function is one – one as well as onto, it is said to be invertible function.

##### Important Terms related to Exercise 1.2

1. One-One Function :f : A → B is said to be one-one if distinct elements in A have distinct images in B. i.e. ∀ x1, x2 ∈ A such that x1 ≠ x2 ⇨f (x1) ≠ f(x2).

2. Onto function (surjective): A function f :A→B is said to be onto iff Rf = B i.e. ∀ b ∈ B, there exists a ∈ A such that f (a) = b

3. Bijective Function : A function which is both injective and surjective is called bijective function.

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