GRE Math Review 1 Arithmetic - Educational Testing Service

Example B: the positive square root of 18 over the positive square root of 2 = the positive square root of the fraction 18 over 2, which is equal to the positive square root of 9, or 3. A square root is a root of order 2. Higher order roots of a positive number n are defined similarly. For orders 3 and 4, the cube root of n and fourth root of n ... ................
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