C HAPTER 11 11.2: Arithmetic Sequences. D EFINITIONS An arithmetic sequence is when we add the same number to each term to get the next term. The number.

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Presentation transcript:

C HAPTER : Arithmetic Sequences

D EFINITIONS An arithmetic sequence is when we add the same number to each term to get the next term. The number added is the common difference.

I S THE SEQUENCE ARITHMETIC ? 2, 4, 8, 16, … 6, 12, 18, … 48, 45, 42, …

A RITHMETIC F ORMULAS Recursive: a n = a n – 1 + d Explicit: a n = a 1 + (n – 1)d

F INDING THE TERM Find the 76 th term of 1100, 1135, 1170, … Find the 90 th term of 5, 11, 17, …

A RITHMETIC M EAN The arithmetic mean is the average of 2 numbers. Find the missing term of the arithmetic sequence. 84, _______, , _______, 57

A SSIGNMENT p evens