Question

Find the first, fourth, and eighth terms of the sequence
A(n) = −2 ∙ 2x − 1

Answer 1

1st term = -5

4th term = -17

8th term = -33

Explanation:

1st term = -2 x (2 x 1) -1

= -2 x 2 - 1

= -4 - 1 = - 5

4th term = -2 x (2 x 2) -1

= -2 x 4 - 1

= -8 - 1 = - 9

8th term = -2 x (2 x 8) - 1

= -2 x 16 - 1

= -32 - 1 = - 33