Question

помогите .............................................................................................................

Answer 1

$b_{3}=6\\\\b_{4}=-3\\\\b_{4}=b_{3}*q\\\\q=\frac{b_{4}}{b_{3}}=\frac{-3}{6}=-\frac{1}{2}\\\\b_{3}=b_{1}*q^{2}\\\\b_{1}=\frac{b_{3} }{(-\frac{1}{2})^{2}}=\frac{6}{\frac{1}{4}}=24\\\\S=\frac{b_{1} }{1-q}=\frac{24}{1-(-\frac{1}{2})}=\frac{24}{\frac{3}{2}}=16\\\\Otvet.\boxed{S=16}$

Answer 2

Ответ:

Объяснение:

q= -3/6= -1/2

6= b1*(-1/2)²

b1=24

S= 24/1,5= 16