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2021 AMC 10B Question 15

AMC10 · 2021 AMC 10B

Question 15

The real number $x$ satisfies the equation $$
x+\frac{1}{x} = \sqrt{5}.
$$ What is the value of $x^{11}-7x^{7}+x^3?$
  1. $ -1 $
  2. $ 0 $
  3. $ 1 $
  4. $ 2 $
  5. $ \sqrt{5} $