Question

(bn): b1=½,b2=¼ визначте b4​

Answer 1

$q = b2 \div b1 = \frac{1}{4} \div \frac{1}{2} = \frac{1}{2} \\ \\ b4 = b1 \times {q}^{n - 1} = \frac{1}{2} \times {( \frac{1}{2}) }^{4 - 1} = \\ \\ = \frac{1}{2} \times { (\frac{1}{2}) }^{3} = \frac{1 \times 1}{2 \times 8} = \frac{1}{16}$

Ответ: b4 = 1/16