Answer:
Step-by-step explanation:
By MVT,

Moreover, 

Hence the largest possible value of f(5) is 13
Answer:
(n-1)
Step-by-step explanation:
<h3>Answer:</h3>

==============================
Explanation:
means the first term is 1500, ie this is the first rent value.
To get the next term, we add on $140
So

and

and so on.
In general, the nth term
is found by adding 140 to the term just before it 
So that's where
comes from.