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Bellwork: - PowerPoint PPT Presentation

Bellwork:. Determine whether each of the following is Arithmetic (something was added each time), Geometric ( something was multiplied each time), or Neither -2, -4, -8, -16… 10, 0, -10, -20… 4, 9, 16, 25…. Notation: .

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Presentation Transcript
Bellwork:
• Determine whether each of the following is Arithmetic (something was added each time), Geometric (something was multiplied each time), or Neither
• -2, -4, -8, -16…
• 10, 0, -10, -20…
• 4, 9, 16, 25…
Notation:
• d= common difference (what is added to each term of an arithmetic sequence)
• r= common ratio (what is multiplied to each term of a geometric sequence)
• n= What term number you are looking at (4th term, 10th term… nth term)
How to find the nth term of an arithmetic sequence

The Formula:

Common Difference

nth term

First term

How to find the nth term of a geometric sequence.

The Formula:

Common Ratio

nth term

First term