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If (f:\mathbb{R}\to\mathbb{R}), (f(x)=\frac{x^3}{1+x^2}), is (f) onto or not?

Answer and explanation

Correct answer: It is onto

Step 1: For every (x), the denominator (1+x^2) is positive, so the function is continuous on all of (\mathbb{R}). Step 2: As (x\to\infty), the value tends to (\infty), and as (x\to-\infty), it tends to (-\infty). Step 3: Continuity together with unbounded behavior in both directions proves onto property.

Related tags

Onto FunctionRational FunctionContinuityExpertRelations And FunctionsMathematicsClass 12 Mcq

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