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Algebra 1 4-7 Guided Practice: Arithmetic Sequences

By Matt Richardson
Last updated almost 3 years ago
41 Questions

Solve It! A wooden post-and-rail fence with two rails is made as shown.
Find the number of pieces of wood needed to build a 4-section fence, a 5-section fence, and a 6-section fence. Not all items will be used.

  • 13 pieces
  • 24 pieces
  • 27 pieces
  • 19 pieces
  • 16 pieces
  • 20 pieces
  • 25 pieces
  • 26 pieces
  • 4-section fence
  • 5-section fence
  • 6-section fence
F.IF.3
F.LE.2

Take Note: Define sequence.

Take Note: Define term of a sequence.

Problem 1 Got It?

F.IF.3
F.BF.1.a

Problem 1 Got It?

F.IF.3
F.BF.1.a

Problem 1 Got It?

F.IF.3
F.BF.1.a

Problem 1 Got It?

F.IF.3
F.BF.1.a

Take Note: Define arithmetic sequence.

Take Note: Define common difference (of an arithmetic sequence).

Take Note: Provide an example of an arithmetic sequence with a common difference of 3 that includes 5 terms.

Problem 2 Got It?

F.IF.3
F.BF.1.a

Problem 2 Got It?

F.IF.3
F.BF.1.a

Problem 2 Got It?

F.IF.3
F.BF.1.a

Problem 2 Got It?

F.IF.3
F.BF.1.a
TAKE NOTE Key Concept

Recursive Formula For an Arithmetic Sequence
The nth term of an arithmetic sequence with first term A(1) and common difference d is given by
Take Note: General recursive formula for an arithmetic sequence:

Take Note: Define recursive formula.

Take Note: In a recursive formula, why is it important to define the first term of the sequence?

Take Note: In a recursive formula, what does n represent?

Take Note: In a recursive formula, what does A(n) represent?

Take Note: In a recursive formula, what does A(1) represent?

Take Note: In a recursive formula, what does d represent?

Problem 3 Got It? Write a recursive formula for the arithmetic sequence.

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Problem 3 Got It? What is the 9th term of the arithmetic sequence?

F.IF.3
F.BF.1.a
F.LE.2

Problem 3 Got It? Write a recursive formula for the arithmetic sequence.

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Problem 3 Got It? What is the 9th term of the arithmetic sequence?

F.IF.3
F.BF.1.a

Problem 3 Got It? Write a recursive formula for the arithmetic sequence.

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Problem 3 Got It? What is the 9th term of the arithmetic sequence?

F.IF.3
F.BF.1.a

Problem 3 Got It? Write a recursive formula for the arithmetic sequence.

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Problem 3 Got It? What is the 9th term of the arithmetic sequence?

F.IF.3
F.BF.1.a

Problem 3 Got It? Reasoning: Is a recursive formula an efficient way to find a value of a term in an arithmetic sequence?

HINT: What if you want to find the 91st term in an arithmetic sequence and only have the first term and recursive formula? You would have to know the 90th term. To know that, you would have to know the 89th term...etc.

Take Note: General explicit formula for an arithmetic sequence:

Take Note: Define explicit formula.

Take Note: In an explicit formula, what does n represent?

Take Note: In an explicit formula, what does A(n) represent?

Take Note: In an explicit formula, what does A(1) represent?

Take Note: In an explicit formula, what does d represent?

Problem 4 Got It?

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Problem 4 Got It?

A.SSE.1.a
F.IF.3

Problem 5 Got It?

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Problem 5 Got It?

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Problem 6 Got It?

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Problem 6 Got It?

A.SSE.1.a
F.IF.3
F.BF.1.a
F.LE.2

Take Note: Summarize the mathematical content of this lesson. What topics, ideas, and vocabulary were introduced?