Respuesta :

sqdancefan

Answer:

  1094

Step-by-step explanation:

The sum of terms of a geometric series is given by ...

  Sn = a1·(r^n -1)/(r -1)

You want the sum for ...

  a1 = 2, r = -3, n = 7

Filling in the numbers, we get ...

  S7 = 2·((-3)^7 -1)/(-3-1) = 2(-2188)/(-4)

  S7 = 1094

Otras preguntas