Sequences

The sequence … , 2^–3, 2^–2, 2^–1, 2⁰, 2¹, 2², 2³, … has a general term of the form 2 ^k and this series can be written as { 2 k } − ∞ ∞ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429294402/968186b9-ffa4-4f2b-aa54-7fc58a604561/content/eq5643.tif"/> indicating that the power or index of the number 2 has a range from -∞ to ∞.