Answer:
2,309.2
This could be wrong but I'm pretty sure it's right
B and C
because the second number is a square of the first number
<span> A negative power means the quantity is
in the denominator of a fraction.
(2) to the -1 power means 1/2
6 to the -3 power means 1/(6 to the 3 power).
13xy to the -8 power
means 1 / (13xy to the 8 power)</span>
That's something like 1 / [ (13 to the 8 power) (x to the 8 power) (y to the 8 power) ]
Rewrite the sums as
and
Now notice that
and
and the important point here is that and converge to constants. For any real constant a, we have
Rewrite the limit as
Then
A plot of the limand for n = first 1000 positive integers suggests the limit is correct, but convergence is slow.