What is the square root of the square root of the square root of 100, in radical form?

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It is the fourth root of 10 -- square root of square root of square root of 100 is the square root of the square root of 10. Assign this value to x and square both sides -- then x^2=sqrt(10); squaring again yields x^4=10 or x=the fourth root of 10.

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