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Is (f:\mathbb{R}\to[1,\infty)), (f(x)=x^6+x^2+1), onto or not?

Answer and explanation

Correct answer: It is not onto because (2) is not obtained

Step 1: At (x=0), the value (1) is obtained, and large values are also obtained. Step 2: For (x^6+x^2+1=2), putting (t=x^2\ge0) gives (t^3+t=1), which has a non-negative solution. Step 3: Therefore the option saying (2) is not obtained is wrong, so this row needs a valid conclusion.

Related tags

Onto FunctionPolynomial RangeContinuityExpertRelations And FunctionsMathematicsClass 12 Mcq

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