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If (f:\mathbb{R}\to(0,\infty)), (f(x)=e^x), what type of function is (f)?

Answer and explanation

Correct answer: Both one-one and onto

Step 1: (e^x) is strictly increasing, so it is one-one. Step 2: Its values are positive, and for every (y>0), (x=\ln y) exists. Step 3: With codomain ((0,\infty)), the function is bijective.

Related tags

FunctionsExponentialBijectionRangeRelations And FunctionsMathematicsClass 12 Mcq

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