nard28
06.07.2019 •
Mathematics
What is the sum of the first 8 terms of the geometric series:
3+6+12+24+
0765
382
286
440
Solved
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Ответ:
765.
Step-by-step explanation:
Sum of n terms = a1 (r^n - 1) / (r - 1) where a1 = the first term and r = the common ratio.
Here r = 6/3 = 2 and a1 = 3.
Sum of 8 terms = 3 * ( 2^8 - 1) / 2 -1)
= 3 * 255
= 765 (answer).
Ответ:
D. -6.1 - (-3.13) = -2.97