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Thursday, November 14 th

Thursday, November 14 th. Warm Up. 10, -20,40,-80,….. What is r ? Write an equation in explicit notation for this sequence . n th term. 1 st term. Common ratio. Explicit. If the first term of a geometric sequence is a 1 , the n th term is a n , and the common ratio is r , then .

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Thursday, November 14 th

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  1. Thursday, November 14th Warm Up 10, -20,40,-80,….. What is r? Write an equation in explicit notation for this sequence

  2. nth term 1st term Common ratio Explicit If the first term of a geometric sequence is a1, the nth term is an , and the common ratio is r, then an=a1rn–1

  3. Word Problems

  4. Today’s Goal Recursive Formula

  5. Recursive Nth term 1st term Previous term Common ratio

  6. #1 What is the common difference? What is the first term? What term are you trying to find? How could you change this to explicit?

  7. Method 1: list…. -2, -6, -18……all the way to 10!

  8. Method 2: Change to explicit

  9. #2 What is the common difference? What is the first term? What term are you trying to find? Change to Explicit

  10. #3 What is the common difference? What is the first term? What term are you trying to find? Change to Explicit

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