Question

2,7,27,107,427,? answer 1707
but my problem how please
solve it​

Answer 1

Step-by-step explanation:

2 , 2 * 4 - 1 = 7 , 7 * 4 - 1 = 27 , 27 * 4 - 1 = 107 , 107 * 4 - 1 = 427 , 427 * 4 - 1 = 1707