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Questions › JNU › JNU SIS 2020 › Q11
0 marksMathematics › Sets, relations and functions › One-to-one, onto and invertible functionsEasyabout 1 min

JNU SIS 2020 Question 11: Sets, relations and functions

Which of the following functions have inverses on (−∞,∞)(-\infty, \infty)(−∞,∞) ?

A. y=5x−2y = 5x - 2y=5x−2

B. y=1−x2y = 1 - x^{2}y=1−x2

C. y=x3−2y = x^{3} - 2y=x3−2

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Plain-text version

Which of the following functions have inverses on (-∞, ∞)? A. y = 5x - 2 B. y = 1 - x² C. y = x³ - 2 (A) A only (B) A and B only (C) A and C only (D) A, B and C only

Also written as: Which of the following functions have inverses on (- inf, inf)? A. y = 5x - 2 B. y = 1 - x^2 C. y = x^3 - 2

Sets, relations and functions has come up 65 times in 6 exams since 2004.

What this question tests

This question is on One-to-one, onto and invertible functions, part of Sets, relations and functions in Mathematics.

Injective, surjective and bijective functions and when an inverse exists.

TestStop has 11 past-paper questions on this subtopic; the nearest in year are below.

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Question from the JNU SIS 2020 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.