Write the first four terms of each geometric sequence.

Question

b. a1 = 6 and r=1/2

Answer 1

a_n= a₁·r^n-1

 

a_n= 6·(1/2)^n-1

 

a₁ = 6·(1/2)^1-1 = 6·(1/2)⁰ = 6

a₂ = 6·(1/2)^2-1 = 6·(1/2)¹ = 3

a₃ = ___?

a₄ = ___?