Khan Academy
Khan Academy: Use Arithmetic Sequence Formulas
Given the formula of an arithmetic sequence, either in explicit form or in recursive form, find a specific term in the sequence. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...
Khan Academy
Khan Academy: Explicit Formulas for Arithmetic Sequences
Solve problems such as: The first four terms in an arithmetic sequence are 12, 5, -2, and -9. Find an explicit formula for the sequence.
Khan Academy
Khan Academy: Recursive Formulas for Arithmetic Sequences
Find the recursive formula of an arithmetic sequence given the first few terms.
Mathigon
Mathigon: Algebra: Special Sequences
In addition to arithmetic and geometric sequences, Fibonacci Numbers, and figurate numbers, there are countless interesting sequences that don't follow a similar, regular pattern. These include prime numbers, perfect numbers, the...
Cool Math
Coolmath: Gauss's Problem and Arithmetic Series
This algebra lesson explains Gauss's Problem and introduces arithmetic series.
Math Planet
Math Planet: Geometric Sequences of Numbers
Gain an understanding of the geometric sequences of numbers by viewing an example and a video lesson.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Arithmetic Sequences
Find a quick, concise explanation of arithmetic sequences. The formula for the nth term and several examples are given to help you understand how to find the nth term of a variety of arithmetic sequences.
Interactive Mathematics
Interactive Mathematics: Arithmetic Progressions
A description of an arithmetic series begins this demonstration, followed by formulas and examples. A real world application is included for practice.
Khan Academy
Khan Academy: Use Arithmetic Sequence Formulas
Given the formula of an arithmetic sequence, either in explicit form or in recursive form, find a specific term in the sequence.
University of Vienna (Austria)
University of Vienna: Arithmetic or Geometric?
Interactive quiz in which the first few terms of a sequence are given, which then must be identified as an arithmetic or geometric sequence. After completion, the site returns a score to judge understanding of the different types of...
Khan Academy
Khan Academy: Extend Arithmetic Sequences
Given the first few terms in an arithmetic sequence, find the next term in the sequence.
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: Sequences
An introductory tutorial on sequences, complete with important definitions, example problems and step-by-step solutions, and several practice exercises for you to complete and check. Provides good explanations and examples of arithmetic,...
Math Open Reference
Math Open Reference: Sequences
Learn about sequences with this handy reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Math Notes and Math Tests
Pre Calculus Note: Arithmetic Sequences and Partial Sums [Pdf]
The tutorial discusses sequences and series. Students learn about arithmetic sequences, geometric sequences, partial sums, and infinite geometric series. The resource consists of class notes and examples with solutions.
National Council of Teachers of Mathematics
The Math Forum: Finding a Term of an Arithmetic Series
This site from the Math Forum contains a common question asked by students learning about arithmetic series which is answered by Dr. Math in a format that is understandable for all ages.
CK-12 Foundation
Ck 12: Analysis: Recursive Formulas
[Free Registration/Login may be required to access all resource tools.] This lesson provides a review of a variety of sequence types including recursive, arithmetic, and geometric. Students examine guided notes, review guided practice,...
CK-12 Foundation
Ck 12: Elem Math: Finding and Completing Growth Pattern Sequences
[Free Registration/Login may be required to access all resource tools.] In this learning module, students must identify a simple pattern in a series of numbers and continue the pattern. Includes video demonstrating a sample problem...
Mangahigh
Mangahigh: Algebra: The Term to Term Rule
Students explore the concept of the term to term rule by working through an online tutorial and then attempting a ten question quiz that increases in difficulty as questions are answered correctly.
ClassFlow
Class Flow: Magic Squares
[Free Registration/Login Required] Students solve arithmetic problems in sequences to create magic squares.
Other
Interactive Stuff: Sequences
Work out the 4th, 5th, 10th, 20th, and nth terms in a number sequence.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Progresiones
This interactive unit introduces the concepts of arithmetic and geometric progression. It shows how to obtain the terms of a progression, its general term and the sum of the terms.
Khan Academy
Khan Academy: Sums of Consecutive Integers
Practice finding the nth number in a sequence of consecutive numbers based on the sum. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Analysis: Explicit Formulas
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn about explicit formulas for identifying terms of a sequence without knowing the preceding term. Students examine guided notes, review...
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