Use the summation formula to find a partial sum of a series with the following properties
1 answer:
Answer:
-36,047.
Step-by-step explanation:
Sum of n terms = a1 .( r^n - 1) / (r - 1)
So Sum of 7 terms = -11 . ((-4)^7 - 1 / (-4-1)
= -11 * -16,385 / -5
= -36,047.
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