al,a2,a3,a4,as,….,an Inthesequenceofpositiveintegersabove,al=a2=1,a3=2,a4=3,andas=5.Ifeachtermafterthesecondisobtainedbyaddingthetwotermsthatcomebeforeitandifan=55,whatisthevalueofn? A: 12 B: 10 C: 9 D: 8 E: 5

公告：维护QQ群：833371870，欢迎加入！
公告：维护QQ群：833371870，欢迎加入！
公告：维护QQ群：833371870，欢迎加入！

2022-06-01

al,a2,a3,a4,as,….,an Inthesequenceofpositiveintegersabove,al=a2=1,a3=2,a4=3,andas=5.Ifeachtermafterthesecondisobtainedbyaddingthetwotermsthatcomebeforeitandifan=55,whatisthevalueofn? A: 12 B: 10 C: 9 D: 8 E: 5

a_l,a₂,a₃,a₄,a_s,….,a_n
Inthesequenceofpositiveintegersabove,a_l=a₂=1,a₃=2,a₄=3,anda_s=5.Ifeachtermafterthesecondisobtainedbyaddingthetwotermsthatcomebeforeitandifa_n=55,whatisthevalueofn?
A: 12
B: 10
C: 9
D: 8
E: 5

答案：

查看

举一反三