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A recursively defined formula for a number pattern, or sequence, tells you the first term in the number pattern, and what to add/subtract to that value in order to find the next terms. Recursive means that you'll need to know one term in order to find what comes next. Here we'll look at how to use a shortcut patternto find the first four terms of an arithmetic sequence.
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Concept (1)
Sample Problems (19)
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Arithmetic Sequences
Problem 1 9,095 viewsGiven 11, 7, 3...
Find a_{301}. 
Arithmetic Sequences
Problem 2 6,926 viewsGiven a_{20} = 101 and a_{21} = 104,
find the general term, a_{n}. 
Arithmetic Sequences
Problem 3 6,380 viewsGiven a_{11} = 52, a_{19} = 92,
find a_{1001} 
Arithmetic Sequences
Problem 4 5,890 viewsFind the number of terms:
7 , 13 , 19 ... 85 3 3 3 3 
Arithmetic Sequences
Problem 5 333 views 
Arithmetic Sequences
Problem 6 309 views 
Arithmetic Sequences
Problem 7 279 views 
Arithmetic Sequences
Problem 8 331 views 
Arithmetic Sequences
Problem 9 83 views 
Arithmetic Sequences
Problem 10 85 views 
Arithmetic Sequences
Problem 11 78 views 
Arithmetic Sequences
Problem 12 86 views 
Arithmetic Sequences
Problem 13 77 views 
Arithmetic Sequences
Problem 14 79 views 
Arithmetic Sequences
Problem 15 80 views 
Arithmetic Sequences
Problem 16 74 views 
Arithmetic Sequences
Problem 17 84 views 
Arithmetic Sequences
Problem 18 79 views 
Arithmetic Sequences
Problem 19 81 views
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