The abbreviation for the fourth root is "sqrt" or "√" followed by a small 4. This symbol represents the operation of finding the number which, when multiplied by itself four times, gives the original number. For example, the fourth root of 16 is written as "√16" or "sqrt(16)" and equals 2.
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The square root is 6, so the fourth root is the square root of 6, or about 2.45. ■
.05 is the square root of one fourth.
8.13288 (rounded)
Rounded to three significant figures, the fourth root of 0.04 is equal to 0.447.
"cbrt" is acceptable abbreviation of cube root, although it is much easier to write "^(1/3)", which is the one-third power, or the cube root. They are mathematically identical.