x/3=1+1/3-1/5+1/7-1/9···直到最后一项绝对值小于0.00001求x的近似值
因为π/4=1-1/3+1/5-1/7+......
所以x/3=2-(1-1/3+1/5-1/7+1/9-......)=2-(π/4)
=2-0.78539816339744830961566084581988......
=1.2146018366025516903843391541801......
x=3.6438055098076550711530174625404......
≈3.64381
热门标签: