Yes 678.05 is greater than 67.805 (because obviously 678 is greater than 67 right? ^ - ^)
Answer:
The first term is:
Step-by-step explanation:
The arithmetic sequence is defined by

where
is the first term
is the common difference
as
the 17th term of an arithmetic sequence is 51.
i.e. 
so

∵
,
, 
∵ 

Therefore, the first term is:
Answer:
The answer is D
Step-by-step explanation:
I wish i can explan but i got to go, piece