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If (f:\mathbb{R}\to\mathbb{R}), (f(x)=x^5+x^3+x), what type is (f)?

Answer and explanation

Correct answer: Bijective

Step 1: The function is strictly increasing because the odd power terms along with (x) increase consistently. Step 2: As (x\to\infty), the function goes to (\infty), and as (x\to-\infty), it goes to (-\infty). Step 3: Hence it is both one-one and onto on (\mathbb{R}).

Related tags

FunctionsBijectionPolynomialOdd FunctionRelations And FunctionsMathematicsClass 12 Mcq

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