Khan Academy: Recursive Formulas for Arithmetic Sequences

Twenty-eight problems, two pages, and an answer key all related to number patterns, recursive formula, and arithmetic sequence. Leaners find the next number in the pattern or sequence and determine the arithmetic formula to go with the...

Provide Algebra I learners with a logical approach to making connections between the types of sequences and formulas with a lesson that uses what class members know about explicit formulas to develop an understanding of...

Find the recursive formula of an arithmetic sequence given the first few terms.

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.

Find the recursive formula of a geometric sequence given the first few terms or given an explicit formula.

Solve problems such as: The first four terms in a geometric sequence are 1/3, 1, 3, and 9. Find an explicit formula for the sequence.

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. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...

Given the first few terms in an arithmetic sequence, find the next term in the sequence. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

To find the 20th term in an arithmetic sequence, use the secret formula. What secret formula? It's: a sub n equals a sub one plus parentheses n minus one close parentheses times d. Got that? No? The watch this video to learn about the...

Find the recursive formula of a geometric sequence given the first few terms or given an explicit formula. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.