09-12-2019
Mathematics

contestada

Find the sum of the first seven terms of the geometric series 8, −24, 72, …
4,376
4,280
5,832
5,836

Respuesta :

waqaskhan15836 waqaskhan15836

09-12-2019

Answer:

4376

Step-by-step explanation:

8, −24, 72, -216, 648, -1944, 5832

Multiply the next number by -3

8 x -3 = -24

-24 x -3 = 72

72 x -3 = -216

-216 x -3 = 648

648 x -3 = -1944

-1944 x -3 = 5832

adding all 7 numbers

8 + (−24)+72 + (-216)+648+ (-1944)+5832 = 4376

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