Question

Am nevoie de ajutor cu acest exercitiu!

Answer 1

$\displaystyle b_1=16,~r=\frac{1}{2} ,~b_4=?\\\\ b_n=b_1 \cdot q^{n-1}\\\\ b_4=16 \cdot \Bigg(\frac{1}{2}\Bigg)^{4-1} =16 \cdot \Bigg(\frac{1}{2} \Bigg)^3=16 \cdot \frac{1^3}{2^3} =16 \cdot \frac{1}{8} =\frac{16}{8} =2$