Question

Find the first 5 terms of the sequence: aa = 2^n - 5.

Answer 1

I got -3, -1, 4 ,11, 20 but it isn't right!

Answer 2

Here are the first 10 terms
{{1, -3}, {2, -1}, {3, 3}, {4, 11}, {5, 27}, {6, 59}, {7, 123}, {8,
251}, {9, 507}, {10, 1019}}

Answer 3

Why are they in pairs?

Answer 4

The first number indicate which term

Answer 5

{7,123} means the that 7th terms is 123

Answer 6

Oh ok thank you!

Answer 7

YW