Question

Write the first five terms of the following sequences whose nth term is:

a_n = (–1)ⁿ . 2ⁿ

Answer 1

an = (−1)ⁿ . 2ⁿ

For, n = 1

a₁ = −2

For n = 2

a₂ = 4

For n = 3

a₃ = −8

For n = 4

a₄ = 16

For n = 5

a₅ = −32