The following figure

The second type:

The root sign is a mathematical symbol. The root sign is a symbol used to represent the root operation of a number or an algebra. If a? =b, then A is the n-th root of B or A is the 1/n power of B. The n-th handwritten and printed characters are represented by, and the number of roots or algebraic expressions are written in the area surrounded by the left side of the symbol and the right side of the horizontal part above the symbol, which cannot be out of bounds.

Extended data:

Nonnegativity

In the range of real numbers,

(1) Even root number cannot be negative, and its operation result is not negative.

(2) It can be negative under odd root sign.

Not limited to real numbers, that is, when considering imaginary numbers, even roots can be negative numbers, and i=√- 1 can be used.

computing formula

Conditions: a≥0, n≥2, n ∈ n

Conditions: a≥0, n≥2, n ∈ n

Conditions for establishment: a≥0, b>0, n≥2 and n ∈ n

Conditions for establishment: a≥0, b>0, n≥2 and n ∈ n

References:

Baidu encyclopedia-root number