Show work explain with formulas.

1. in the series: 8 + 19 + 30 + 41 +

what is the 44th term and what is sum of the first 44th terms?

3. for the series: 25 + 34 + 43 + 52 + + 439;

write the series in summation notation and find the sum if it exists.

4. for the series: 12 + 24 + 48

write the series in summation notation and find the sum if it exists.