Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
2.6k views
in Mathematics by (57.5k points)
edited by

Which one of the following functions f : R → R is injective? 

(a) f (x) = |x|, ∀ x ∈ R 

(b) f (x) = x2, ∀ x ∈ R 

(c) f (x) = 11, ∀ x ∈ R 

(d) f (x) = − x, ∀ x ∈ R

1 Answer

+1 vote
by (63.7k points)
selected by
 
Best answer

Correct option is (d)

Explanation :

An injective function means one-one. 

In option (d), f (x) = −x 

For every values of x, we get a different value of f. 

Hence, it is injective.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...