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Notationally, number patterns can be very confusing. It is important to keep organized about which value is a term number versus which value is the term itself. Here, we are asked to find what is the term number for a given term itself. In order to do this, we need to solve for n in the explicit formula for an arithmetic sequence.
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Sample Problems (19)
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Arithmetic Sequences
Problem 1 9,088 viewsGiven 11, 7, 3...
Find a_{301}. 
Arithmetic Sequences
Problem 2 6,923 viewsGiven a_{20} = 101 and a_{21} = 104,
find the general term, a_{n}. 
Arithmetic Sequences
Problem 3 6,377 viewsGiven a_{11} = 52, a_{19} = 92,
find a_{1001} 
Arithmetic Sequences
Problem 4 5,884 viewsFind the number of terms:
7 , 13 , 19 ... 85 3 3 3 3 
Arithmetic Sequences
Problem 5 330 views 
Arithmetic Sequences
Problem 6 306 views 
Arithmetic Sequences
Problem 7 276 views 
Arithmetic Sequences
Problem 8 328 views 
Arithmetic Sequences
Problem 9 82 views 
Arithmetic Sequences
Problem 10 85 views 
Arithmetic Sequences
Problem 11 77 views 
Arithmetic Sequences
Problem 12 84 views 
Arithmetic Sequences
Problem 13 75 views 
Arithmetic Sequences
Problem 14 77 views 
Arithmetic Sequences
Problem 15 80 views 
Arithmetic Sequences
Problem 16 72 views 
Arithmetic Sequences
Problem 17 83 views 
Arithmetic Sequences
Problem 18 77 views 
Arithmetic Sequences
Problem 19 80 views
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