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Any real life situation where there is a constant difference between terms, called d, can be modeled using an arithmetic sequence, or number pattern. We can use such a number pattern to find out how many seats would be in the n'th row (in this case, 20th row). Use the explicit formula for an arithmetic sequence that is based on how many seats are in the first row and how many are added in each subsequent row.
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Concept (1)
Sample Problems (19)
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Arithmetic Sequences
Problem 1 9,080 viewsGiven 11, 7, 3...
Find a_{301}. 
Arithmetic Sequences
Problem 2 6,921 viewsGiven a_{20} = 101 and a_{21} = 104,
find the general term, a_{n}. 
Arithmetic Sequences
Problem 3 6,375 viewsGiven a_{11} = 52, a_{19} = 92,
find a_{1001} 
Arithmetic Sequences
Problem 4 5,882 viewsFind the number of terms:
7 , 13 , 19 ... 85 3 3 3 3 
Arithmetic Sequences
Problem 5 329 views 
Arithmetic Sequences
Problem 6 305 views 
Arithmetic Sequences
Problem 7 276 views 
Arithmetic Sequences
Problem 8 327 views 
Arithmetic Sequences
Problem 9 81 views 
Arithmetic Sequences
Problem 10 84 views 
Arithmetic Sequences
Problem 11 75 views 
Arithmetic Sequences
Problem 12 83 views 
Arithmetic Sequences
Problem 13 75 views 
Arithmetic Sequences
Problem 14 77 views 
Arithmetic Sequences
Problem 15 79 views 
Arithmetic Sequences
Problem 16 71 views 
Arithmetic Sequences
Problem 17 83 views 
Arithmetic Sequences
Problem 18 76 views 
Arithmetic Sequences
Problem 19 80 views
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