Please help me with this problem

Work Shown:

The rule is to start with the first term (a1 = 3), then double that and subtract off 1 to get the next term.

Keep doing the "double the value and subtract 1" process to generate as many terms as you want.

a1 = first term = 3

a2 = second term

a2 = 2*a1 - 1   double the previous term, subtract 1

a2 = 2*3 - 1

a2 = 6 - 1

a2 = 5

The second term is 5

a3 = third term

a3 = 2*a2 - 1

a3 = 2*5 - 1

a3 = 10 - 1

a3 = 9

The third term is 9

a4 = fourth term

a4 = 2*a3 - 1

a4 = 2*9 - 1

a4 = 18 - 1

a4 = 17

The fourth term is 17

The first four terms of this recursive sequence is: 3, 5, 9, 17

practice. practice. practice.