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Arithmetic Sequences  Problem 5
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
An arithmetic mean is a term in a number sequence that has been omitted, and we are asked to find it. If you have two terms with one mean between them, then that mean will literally be the mean, or average of the terms on either side of it. We need to add those terms together and divide by two.
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
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Arithmetic Sequences
Problem 1 11,720 viewsGiven 11, 7, 3...
Find a_{301}. 
Arithmetic Sequences
Problem 2 8,993 viewsGiven a_{20} = 101 and a_{21} = 104,
find the general term, a_{n}. 
Arithmetic Sequences
Problem 3 8,420 viewsGiven a_{11} = 52, a_{19} = 92,
find a_{1001} 
Arithmetic Sequences
Problem 4 7,827 viewsFind the number of terms:
7 , 13 , 19 ... 85 3 3 3 3 
Arithmetic Sequences
Problem 5 1,551 views 
Arithmetic Sequences
Problem 6 1,698 views 
Arithmetic Sequences
Problem 7 1,923 views 
Arithmetic Sequences
Problem 8 2,240 views 
Arithmetic Sequences
Problem 9 1,425 views 
Arithmetic Sequences
Problem 10 1,250 views 
Arithmetic Sequences
Problem 11 1,458 views 
Arithmetic Sequences
Problem 12 1,238 views 
Arithmetic Sequences
Problem 13 1,149 views 
Arithmetic Sequences
Problem 14 1,239 views 
Arithmetic Sequences
Problem 15 1,192 views 
Arithmetic Sequences
Problem 16 1,210 views 
Arithmetic Sequences
Problem 17 1,408 views 
Arithmetic Sequences
Problem 18 1,177 views 
Arithmetic Sequences
Problem 19 1,184 views
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