［紧急求助］交错级数1-1/2+1/3-1/4+…收敛于几?

Question

［紧急求助］交错级数1-1/2+1/3-1/4+…收敛于几?

Answer 1

交错调和级数1-1/2+1/3-1/4+…+(-1)^(n-1)*1/n+… 条件收敛,其和为ln2.