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goldfiish [28.3K]
3 years ago
15

Find the 6th partial sum of summation of 7 open parentheses 4 close parentheses to the I minus 1 power from 1 to infinity

Mathematics
1 answer:
kozerog [31]3 years ago
4 0
Answer: option C. 9,555.

Justification:

1) The summation is:

6
∑  7(4)^ (i - 1)
i=1

2) Substitute with the values of i from 1 to 6 (note that 7 is a common factor of all the terms) =>

7 { 4^(1-1) + 4^(2-1) + 4^(3-1) + 4^(4-1) + 4^(5-1) + 4^(6-1) } =

= 7 { 4^0 + 4^1 + 4^2 + 4^3 + 4^4 + 4^5 } = 7 { 1 + 4 + 16 + 64 + 256 + 1024} =

7{1365} = 9,555.

Answer: 9,555


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Answer:

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Step-by-step explanation:

Given the sequence

459,450,441,..

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a_n=a_1+\left(n-1\right)d

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