Arithmetic sequences

Constant difference sequences with explicit and recursive formulas.

Standards:F-BF.A.2F-LE.A.2

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

An arithmetic sequence has a first term of 7 and a common difference of 4. What is the 15th term?

Question 2 of 3

The first three terms of an arithmetic sequence are: 7, 14, 21. What is the 12th term?

Question 3 of 3

An arithmetic sequence has a common difference of −3 and the 8th term is 5. What is the 1st term?

How this fits in

Arithmetic sequences is one skill in the Sequences & Series unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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