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1991 AMC 12 Question 6

AMC12 · 1991 AMC 12

Question 6

If $x\ge0,$ then $\sqrt{x\sqrt{x\sqrt{x}}}=$
  1. $x\sqrt{x}$
  2. $x\sqrt[4]{x}$
  3. $\sqrt[8]{x}$
  4. $\sqrt[8]{x^3}$
  5. $\sqrt[8]{x^7}$