We have:

and:

so:


It is a finite sum, so it is convergent.
Answer:
39.34 juniors and 30.1 seniors
The answer is going to be x=22
If x is one integer and x+1 is the next, we have 2*x+9=x+1. Subtracting 9 and x from both sides, we get x(the smaller number)=-8 and the larger number is -7.