Pz solve it fast
Its urgent.

Explanation:

1. Write the general general form of the nth term of a geometric series

2. Write the expression for the product of the first five terms equal to 243

3. Write the third term

Notice that the third term is

Then, the third term is 3.

4. Goe with the aritmetic series: the tenth term is 3

5. Write the expression for the sum of the first 19 terms of the arithmetic series

General formula:

For n = 19

6. Write the expression for the term #10

7. Substitute in the expression for S