解:第1个猴子摘走1/3,再吃掉1个后树上还剩下桃子数量是:
m-m/3-1
=(2m/3-1 )个
第2个猴子摘走1/3,再吃掉1个后树上还剩下桃子数量是:
(2m/3-1)-(2m/3-1)/3-1
=(2m/3-1)*2/3-1
=(4m/9-5/3)个
第3个猴子摘走1/3,再吃掉1个后树上还剩下桃子数量是:
(4m/9-5/3)-(4m/9-5/3)/3-1
=(4m/9-5/3)(1-1/3)-1
=(4m/9-5/3)*2/3-1
=8m/27-10/9-1
=8m/27-19/9 (个)
(m-39)/9