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Consider the following general term for a sequence
`a_n=4+(-1)^(n-1)*(5n)`


What are the first five terms of the sequence?
`a_1=`  
`a_2=`  
`a_3=`  
`a_4=`  
`a_5=`  


↑
X
MathQuill
   x  x  √  n√  |   | (   ) π ∞ DNE
   x  √  (   ) π ∞ DNE
( ) ( ] [ ) [ ] —∞ ∞ ∪ DNE
< > ≤ ≥ or All Real Numbers DNE
log logn ln n√  | | e 
sin cos tan arcsin arccos arctan ⟨ ⟩
[more..]