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AMC 10 2021b Problem 15

  • Paper

The real number xx satisfies the equation x+1x=5x+\frac{1}{x} = \sqrt{5}. What is the value of x11−7x7+x3?x^{11}-7x^{7}+x^3? (A) −1(B) 0(C) 1(D) 2(E) 5\textbf{(A)} ~-1 \textbf{(B)} ~0 \textbf{(C)} ~1 \textbf{(D)} ~2 \textbf{(E)} ~\sqrt{5}

Dataset text NuminaMath-1.5. Quoted with source.

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