用python语言写

Question

 

Answer 1

 代码如下：{如果对你有帮助，可以给我个采纳吗，谢谢!! 点击我这个回答右上方的【采纳】按钮}。

n = 3
r4 = 1
x = 1
f = False
while abs(x)>=1e-6:
    x = 1/n
    if f:
        r4 += x
    else:
        r4 -= x
    n += 2
    f = not f
print(r4)