4th term is 14. the it goes 17.then 19,22,25,28. the 9th term is 28. The 15th term is 43.
According to Vieta's Formulas, if

are solutions of a given quadratic equation:
Then:
is the completely factored form of

.
If choose

, then:

So, according to Vieta's formula, we can get:

But

:
Answer:
6,476.90 i think
Step-by-step explanation:
<span> So, if n=1 there is one sublevel. if n=3 there are three sublevels</span>