Which of the following is injective but not surjective ? - Vidyadip

MCQ

Which of the following is injective but not surjective ?

✓
$f : N \to N$ , $f(x) = 2x + 3$
B
$f : R \to R$ , $f\left( x \right) = \frac{{4x + 3}}{5}$
C
$f : R \to R$ , $f(x) = x^3 -x$
D
$f : R \to R$ , $f(x) = ln(|x| + 1)$

✓

Answer

Correct option: A.

$f : N \to N$ , $f(x) = 2x + 3$

a
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