题解 | #求解立方根#
求解立方根
https://www.nowcoder.com/practice/caf35ae421194a1090c22fe223357dca?tpId=37&tags=&title=&difficulty=&judgeStatus=&rp=1&sourceUrl=%2Fexam%2Foj%2Fta%3FtpId%3D37&gioEnter=menu
num = float(input()) ans = num/3 prev = ans-1 while ans-prev > 0.0001 or ans-prev < -0.0001 : prev = ans ans -= ans/3-num/ans/ans/3 print('{:.1f}'.format(ans))
牛顿法,因为收敛速度很快所以用while循环