for a cube root symbol hold down the ALT button and type 0179 and a little symbol should appear looking like ³ this it's actually the cubed root symbol, not an s!
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It means it is a different kind of root, such as a cubic root, which has a three above the square root symbol ('radical sign'). If y is the square root of x, it means that y2 = x. So the square root of 4 is 2, and 22 is 4. If y is the cube root of x, it means that y3 = x. So the cube root of 8 is 2, and 23 = 8.
-54 is not a perfect cube; thus, the answer contains cube roots. Because this site doesn't allow us to insert images in answers, we'll let C(x) represent "the cube root of X" such that C(8) = 2, etc. The answer, then, is 3 * C(-2).
2 cube root 24 plus 3 cube root 81 is 18.7492444
the index of a cube root is 3.
the cube root of 64 =4