Hello i really need some help with these:

1. Find out if they are convergent - and if so find the SUM.

2. Find the absolute/partial convergence or divergence:

3. Find the interval of convergence:

4. Find and draw the limit of the function:

5. Find out if the function has a limit and if so find the limit:

6. Find R, represent the double integral as iterated integral in two ways (vertical simple and horizontal simple):0

7. Find the particular solution:

Thanks in advance