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# Explicit Formulas

## Identify and apply a general rule for terms in a sequence

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
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## Explicit Formulas

by CK-12 //at grade
Explicit formulas for identifying terms of a sequence without knowing the preceding term.
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## Using and Writing nth Term Rules for Sequences

by CK-12 //at grade
This lesson covers how to write the nth term and how to use it to find terms in the sequence.
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• PLIX

## Explicit Formulas: Tiles for Writing nth Term in a Sequence

by CK-12 //at grade
Explicit Formulas Interactive
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• Video

## Introduction to Explicit Formulas

by CK-12 //at grade
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