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If (f:\mathbb{R}\to(1,\infty)), (f(x)=e^x+1), choose the correct statement.

Answer and explanation

Correct answer: Onto and one-one

Step 1: Since (e^x>0), (e^x+1>1). Step 2: For any (y>1), (x=\ln(y-1)), which is real. Hence the function is onto. It is increasing, so it is also one-one. Step 3: Vertical shifts change the range of exponential functions.

Related tags

Relations-FunctionsExponential-ShiftOnto-FunctionOnto FunctionRelations And FunctionsMathematicsClass 12 Mcq

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