Question

Find the 20th term of the arithmetic sequence 1, 3, 5, 7, 9, ... *
10

Answer 1

Answer: 39

Explanation:

`a_(n)` = 1 + (20-1)2

`a_(n)` = 1 + (19)2

`a_(n)` = 1 + 38

`a_(n)` = 39