Question

Find the correct alternate to complete a series 4,9,19,39

Answer 1

4 * 2 + 1 = 9
9 * 2 + 1 = 19
19 * 2 + 1 = 39
39 * 2 + 1 = 79.

and it goes on
hope this helps
mark me as. brainliest plz.....

Answer 2

CORRECT ANSWER IS

89