AMC 10 Step by Step
2021 AMC 10BProblem 15P11-15~4 minPrint

The real number xx satisfies the equation x+1x=5x+\frac{1}{x} = \sqrt{5} . What is the value of x117x7+x3?x^{11}-7x^{7}+x^3?

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Problem © Mathematical Association of America (MAA), American Mathematics Competitions. Reproduced for non-commercial educational use. Solution and commentary are original to this site.