\[- 32; - 16; - 8;\ldots\]
\[b_{1} = - 32;\ \ b_{2} = - 16;\ \]
\[q = \frac{b_{2}}{b_{1}} = \frac{- 16}{- 32} = \frac{1}{2};\ \]
\[b_{4} = b_{3} \cdot q = - 8 \cdot \frac{1}{2} = - 4;\]
\[b_{5} = b_{4} \cdot q = - 4 \cdot \frac{1}{2} = - 2;\]
\[b_{6} = b_{5} \cdot q = - 2 \cdot \frac{1}{2} = - 1.\]