编写程序，使用牛顿迭代法求方程在x附近的一个实根
def solution(a, b, c, d):
x = 1.5
x0 = x
f = a * x0**3 + b * x0**2 + c * x0 + d
fd = 3 * a * x0**2 + 2 * b * x0 + c
h = f / fd
x = x0 - h
while abs(x - x0) >= 1e-5:
x0 = x
f = a * x0**3 + b * x0**2 + c * x0 + d
fd = 3 * a * x0**2 + 2 * b * x0 + c
h = f / fd
x = x0 - h
return x
if __name__ == '__main__':
print("请输入方程的系数: ")
a, b, c, d = map(float, input().split())
print("方程的参数为:", a, b, c, d)
x = solution(a, b, c, d)
print("所求方程的根为 x=%.6f" % x)
标签：__,方程,fd,print,python0011,x0 From： https://www.cnblogs.com/Lyh3012648079/p/18205362