Предмет: Алгебра, автор: mbymwyywwyw

АЛГЕБРА СРОЧНО!!! 30 МИНУТ ОСТАЛОСЬ ЗАДАНИЕ НА ФОТКЕ!! НУЖНО ОБЪЯСНЕНИЕ КАК ДЕЛАТЬ!!​

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Ответы

Автор ответа: Benson63515
0

Ответ:

Объяснение:

S3= -3*((-1/3)³-1)/(-1/3-1)= 28/9:(-4/3)= -28/9*3/4= -7/3

Автор ответа: dobra888
0

Відповідь:   S₃ = - 2 1/3 .

Пояснення:

  ( bₙ ) :  b₁ = - 3 ;  q = - 1/3 ;  S₃ - ?

   b₂ = b₁q = - 3 * (- 1/3 ) = 1 ;   b₃ = b₂q = 1 * (- 1/3 ) = - 1/3 .

   S₃ = b₁ + b₂ + b₃ = - 3 + 1 - 1/3 = - 2 1/3 ;     S₃ = - 2 1/3 .

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