因为工作的需要，要在单片机上实现开根号的操作。
Because the work needs to realize single-chip on the operation of open radical sign .
如果这当中有一个负数，乘积就会变成负的，如果你对一个负数开根号，你就会得到一个虚数。
If you had one negative number in it, then the product would be a negative number and, if you took a root of that, then you might get an imaginary number.
用于数的开根的符号的名称，形如(图形根号)。
The name for the symbol used for taking the ROOT of a number, which looks like this: (...).
用于数的开根的符号的名称，形如(图形根号)。
The name for the symbol used for taking the ROOT of a number, which looks like this: (...).
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