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PatienceJoy
01.11.2019 •
Mathematics
What is the sum of the first eight terms of the series?
(−800)+(−200)+(−50)+(−12.5)+
round the answer to two decimal places.
−1066.68
−1066.65
−1066.60
−1062.50
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Ответ:
-1066.65 to 2 decimal places.
Step-by-step explanation:
(−800)+(−200)+(−50)+(−12.5)+...
This is a Geometric series with common ratio r =(-200) / ) / (-800) = 0.25 and first term a1 = -800.
Sum of n terms = a1 * (1 - r^n) / (1 - r)
Sum of 8 terms = -800 * (1 - 0.25^8) / (1 - 0.25)
= -800 * 1.333313
= -1066.65.
Ответ:
−1066.65
This is the correct answer! I just took the test
Ответ:
30 minutes
Step-by-step explanation:
135 = 90 + 45
45 is half of 90
so 20 + half of 20 which is 10 = 30
HOPE THIS HELPS
PLZZ MARK BRAINLIEST