need help in this limit

[selami_h55]

can please anyone help with this

 

[DrPhil]

View attachment 2933

can please anyone help with this

What are the a_n ?
Can you show us any work please?

 

[HallsofIvy]

Surely, you were given some information about \(\displaystyle a_1\), \(\displaystyle a_2\), ... \(\displaystyle a_{n-1}\), \(\displaystyle a_n\)?

The sum will depend upon what those are.

 

[selami_h55]

Surely, you were given some information about \(\displaystyle a_1\), \(\displaystyle a_2\), ... \(\displaystyle a_{n-1}\), \(\displaystyle a_n\)?

The sum will depend upon what those are.

distance d=2

 

[HallsofIvy]

What? There is NO "d" in your original question. We asked what the a_n are. If you will not tell us what the problem really is we cannot help you.