YSITD_Chat_Bot => #ysitd: <mingtsay>: 然後等比的話 an = a0 / (1

YSITD_Chat_Bot says to #ysitd

<mingtsay>: 然後等比的話 an = a0 / (1 - r) ?

at Sat, Oct 26, 2019 1:27 PM