x1=1+1/2+1/3+1/4+ ...+1/(2*n)
x2= 1/2+1/4+1/6+1/8+ ...+ 1/(2*n)=(1/2)(1+1/2+1/3+1/4+...+1/n)
x3= x1-x2-1=1/3+1/5+1/7 +...+ 1/(2n-1)
x1和x2可用欧拉公式求出近似值(n越大越精确),x3自然可以得到了.希望给予采纳!
x1=1+1/2+1/3+1/4+ ...+1/(2*n)
x2= 1/2+1/4+1/6+1/8+ ...+ 1/(2*n)=(1/2)(1+1/2+1/3+1/4+...+1/n)
x3= x1-x2-1=1/3+1/5+1/7 +...+ 1/(2n-1)
x1和x2可用欧拉公式求出近似值(n越大越精确),x3自然可以得到了.希望给予采纳!