Since f(1)=−4=f(−1), f is many-one (B). Range of f is [−5,∞), which equals the codomain, so f is onto (C). So B and C are true.
If f:R→[−5,∞) is defined as f(x)=x2−5, then the function f is
A. one-one
B. many-one
C. onto
D. into
Which of the above statements are true?
Choose the correct answer from the options given below:
Held on 16 Jul 2022 · Verified 13 Jul 2026.
A and C only
B and D only
B and C only
C and D only
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