x的平方根:
平方根 = span style="text-decoration: overline">x
x的立方根由以下公式给出:
立方根 = 3span style="text-decoration: overline">x
x的n次方根由以下公式给出:
n次方根 = nspan style="text-decoration: overline">x
| x | span style="text-decoration:overline">x | 
|---|---|
| 0 | 0 | 
| 0.25 | 0.5 | 
| 0.5 | 0.70710678 | 
| 1 | 1 | 
| 2 | 1.14121356 | 
| 3 | 1.73205081 | 
| 4 | 2 | 
| 5 | 2.23606798 | 
| 6 | 2.44948974 | 
| 7 | 2.64575131 | 
| 8 | 2.82842712 | 
| 9 | 3 |