  PRE-ALGEBRA
ALGEBRA 1
GEOMETRY
ALGEBRA 2
TRIGONOMETRY
PRE-CALCULUS
CALCULUS    Algebra 2, 2008 PAGE: 634 SET: Exercises PROBLEM: 34
Please look in your text book for this problem Statement  The arithmetic series is .

The nth term of an arithmetic sequence is .

Where is first term of the sequence and d is common difference.

Here .

Common difference ,

So d = 7. The nth term of an arithmetic sequence is . (Substitute )

Distribute terms using distributive property: .  (Multiply: ) (Subtract: ) Apply addition property of equality: a = b then . (Add 1 to each side) (Apply additive inverse property: ) (Apply additive identity property: ) (Add: ) Apply division property of equality: a = b then . (Divide each side by 7) (Cancel common terms) (Divide: ) The sum of an arithmetic series .

Where is the first term and is the nth term.  (Substitute ) (Add: ) (Multiply: ) (Divide: ) The sum of the arithmetic series is 721. TESTIMONIALS
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