Question

$\begin{cases}b(1)=-500\\\\ b(n)=b(n-1)\cdot \dfrac{4}{5} \end{cases}$
What is the 3rd term in the sequence?

Answer 1

Answer:

b(1) = -500

b(2) = b(2-1).4/5 = b(1).4/5 = -500×4/5 = -400

b(3) = b(3-1).4/5 = b(2).4/5 = -400×4/5 = -320

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