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Arithmetic Sequence

Last updated almost 5 years ago

3 questions

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

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Question 1

1.

What is the first term? Show your work.

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1

Question 2

2.

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

Question 3

3.

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