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If (f:\mathbb{R}\to\mathbb{R}), (f(x)=\begin{cases}x+1,&x\ge0\x-1,&x<0\end{cases}), which statement is correct about (f)?

Answer and explanation

Correct answer: One-one but not onto

Step 1: For (x<0), values lie in ((-\infty,-1)), and for (x\ge0), values lie in ([1,\infty)). Step 2: The two parts do not overlap, so the function is one-one. Step 3: But values in ((-1,1)) are missing, so it is not onto.

Related tags

FunctionsPiecewiseOne OneRangeRelations And FunctionsMathematicsClass 12 Mcq

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