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Arithmetic Sequence

Last updated over 5 years ago

3 Nsɛmmisa

In an arithmetic sequence, the third term is 10 and the fifth term is 16.

1

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1.

What is the first term? Show your work.

1

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2.

What is the sum of the first 20 terms? Show your work.

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3.

Express the sum of the first 20 terms in sigma notation.