Question

помогите !!!!!!!!!!!!!!!

Answer 1

$b1 = - 7 \\ b(n + 1) = - \frac{1 }{b(n)} \\ b2 = - \frac{1}{b1} = - \frac{1}{ - 7} = \frac{1}{7} \\ b3 = - \frac{1}{b2} = - \frac{1}{ \frac{1}{7} } = - 7$
Ответ: b3=-7

Answer 2

$b_2=-\frac{1}{b_1}=-\frac{1}{-7}=\frac{1}{7};$;

$b_3=-\frac{1}{b_2}=-\frac{1}{\frac{1}{7}}=-7;$