说明:The factorial of a nonnegative integer n is written n! (pronounced “n factorial”) and is defined
as follows:
n! = n • (n - 1) • (n - 2) • ... • 1 (for values of n greater than or equal to 1)
and
n! = 1 (for n = 0).
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说明:解方程a*x*x+b*x+c=0,输入a,b,c解出方程的根-Solution of equations a* x* x+ b* x+ c = 0, input a, b, c solved the root of equation <六君> 在 2025-06-21 上传
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