Answer:
88
Step-by-step explanation:
You are multiplying -2 each time to find the next term:
8 x (-2) = -16
-16 x (-2) = 32
32 x (-2) = -64
-64 x (-2) = 128
Now, find the sum of the first 5 terms:
8 - 16 + 32 - 64 + 128 = (-16 - 64) + (128 + 32 + 8) = (- 80) + (168) = 88
88 is the sum of the first 5 terms of this series.
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