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# Unit 9: Sequences

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## About this unit

Sequences are a special type of function that are useful for describing patterns. In this unit, we'll see how sequences let us jump forwards or backwards in patterns to solve problems.

### Learn

### Practice

- Extend arithmetic sequencesGet 3 of 4 questions to level up!
- Use arithmetic sequence formulasGet 5 of 7 questions to level up!

### Learn

### Practice

- Recursive formulas for arithmetic sequencesGet 3 of 4 questions to level up!
- Explicit formulas for arithmetic sequencesGet 3 of 4 questions to level up!
- Converting recursive & explicit forms of arithmetic sequencesGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 400 Mastery points

### Learn

### Practice

- Extend geometric sequencesGet 3 of 4 questions to level up!
- Extend geometric sequences: negatives & fractionsGet 3 of 4 questions to level up!
- Use geometric sequence formulasGet 3 of 4 questions to level up!

### Learn

### Practice

- Recursive formulas for geometric sequencesGet 3 of 4 questions to level up!
- Explicit formulas for geometric sequencesGet 3 of 4 questions to level up!
- Converting recursive & explicit forms of geometric sequencesGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 480 Mastery points

### Practice

- Sequences word problemsGet 3 of 4 questions to level up!

### Learn

### Practice

- Evaluate sequences in recursive formGet 3 of 4 questions to level up!
- Sequences and domainGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 240 Mastery points

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Level up on all the skills in this unit and collect up to 1,400 Mastery points!