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What is the x-coordinate of the x-intercept of the function \(f(x)=x^3+8\)?

Answer and explanation

Correct answer: \(x=-2\)

At an x-intercept, the function value is zero. Thus, \(x^3+8=0\), so \(x^3=-8\) and \(x=-2\). Therefore, the intercept is \((-2,0)\), whose x-coordinate is \(x=-2\). In such questions, set \(y=f(x)=0\); \(x=8\) is an incorrect choice based only on the constant term.

Related tags

Standard-FunctionsCubic-FunctionX-InterceptGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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