ответ: a) 3/2.
Объяснение:
2; -2/3; 2/9; -2/27; ...
b₁=2 b₂=-2/3
q=b₂/b₁=(-2/3)/(2)
q=-1/3
S=b₁/(1-q)=2/(1-(-1/3))=2/(1+(1/3))=2/1¹/₃=2/(4/3)=2*3/4=3/2.
ответ: a) 3/2.
Объяснение:
2; -2/3; 2/9; -2/27; ...
b₁=2 b₂=-2/3
q=b₂/b₁=(-2/3)/(2)
q=-1/3
S=b₁/(1-q)=2/(1-(-1/3))=2/(1+(1/3))=2/1¹/₃=2/(4/3)=2*3/4=3/2.