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If (f:\mathbb{R}\setminus{0}\to\mathbb{R}\setminus{0}), (f(x)=\frac{1}{x}), what is the correct option?

Answer and explanation

Correct answer: Onto and one-one

Step 1: For any (y\ne 0), from (y=\frac{1}{x}), we get (x=\frac{1}{y}). Step 2: This (x) is also non-zero, so it lies in the domain. Hence the function is onto. Different (x) values give different reciprocals, so it is one-one too. Step 3: For reciprocal functions, removing zero from domain and codomain is essential.

Related tags

Relations-FunctionsReciprocal-FunctionOnto-FunctionOnto FunctionRelations And FunctionsMathematicsClass 12 Mcq

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