Express the series using sigma notation. 10 + 50 + 250 + 1250.

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02-02-2017
Mathematics

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Express the series using sigma notation. 10 + 50 + 250 + 1250.

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LammettHash LammettHash · Answer 1 · 2017-02-02T16:35:16+01:00

LammettHash LammettHash

02-02-2017

Each next term is being multiplied by 5. Assuming there are only 4 terms to the sum, you have

[tex]10+50+250+1250=10\times5^0+10\times5^1+10\times5^2+10\times5^3=\displaystyle\sum_{i=0}^310\times5^i[/tex]

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