A) One-one and onto
B) One-one but not onto
C) Onto but not one-one
D) Neither one-one nor onto
Correct Answer: B
Solution :
\[{f}'(x)=\frac{1}{{{(1+x)}^{2}}}>0,\,\forall x\in [0,\,\infty )\] and range \[\in [0,\,1)\] Þ function is one-one but not onto.
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