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 12.1 Logic 12.2 Sequences 12.3 Limits 12.4 Imaginary and Complex Numbers

 12.5 Key Formulas 12.6 Review Questions 12.7 Explanations
Key Formulas
nth Term of an Arithmetic Sequence
an = a1 + (n – 1)d, where a1 is the first term in the sequence, and d is the common difference.
Sum of the First n Terms of an Arithmetic Sequence
nth Term of a Geometric Sequence
bn = b1rn – 1, where b1 is the first term of the sequence and r is the common ratio.
Sum of the First n Terms of a Geometric Sequence
 Jump to a New ChapterIntroduction to the SAT IIIntroduction to SAT II Math ICStrategies for SAT II Math ICMath IC FundamentalsAlgebraPlane GeometrySolid GeometryCoordinate GeometryTrigonometryFunctionsStatisticsMiscellaneous MathPractice Tests Are Your Best Friends
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