Question

9, 20, 43, 91, 189 ........​

Answer 1

Answer:

389

Step-by-step explanation:

$9 \times 2 + 2 = 20 \\ 20 \times 2 + 3 = 43 \\ 43 \times 2 + 5 = 91 \\ 91 \times 2 + 7 = 189 \\ 189 \times 2 + 11 = 389$