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What are the intersection points of the graphs of f(x)=x^3 and g(x)=x?

Answer and explanation

Correct answer: (-1,-1), (0,0), (1,1)

Two function graphs intersect where their y-values are equal for the same x-value. Therefore set x^3=x and solve: x^3−x=0. Factoring gives x(x^2−1)=0, and then x(x−1)(x+1)=0. Hence the possible x-values are −1, 0, and 1. Since the second graph is y=x, the corresponding y-values are exactly −1, 0, and 1. The intersection points are consequently (−1,−1), (0,0), and (1,1), making option A correct. Option B omits the valid negative solution. Option C assigns the wrong signs to the nonzero y-coordinates. Option D recognizes only the central intersection and misses the two additional points.

Related tags

GraphsIntersectionCubic-FunctionsGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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