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Sept. 16 Arithmetic Sequences Practice

Algebra 1<br>Middle school math

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Sept. 16 Arithmetic Sequences Practice

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  1. guacamole day! 9.16.22 Take out the warm-up from yesterday. Finish any that were not complete. Warm up Desmos Kahoot What is the best smell in the world? Pencil, Notebook, Chromebook.

  2. Arithmetic Sequences Warm - Up Copy and complete in your Warm-up section. Write the explicit formula: a9= 7 a20 = -59

  3. Arithmetic Sequences Warm - Up Copy and complete in your Warm-up section. Write the explicit formula: a9= 7 a20 = -59 First find d: Terms 9 and 20 are 11 apart. (20-9=11) The term values are -66 apart. (-59-7=-66) Divide to find d: -66/11 = -6 d=-6

  4. Warm - Up Copy and complete in your Warm-up section. Write the explicit formula: a9= 7 a20 = -59 Next, use the value of d and one of the terms to fill in the formula: an = a1 + d(n - 1) 7 = a1 - 6 (9 - 1) 7 = a1 - 6(8) 7 = a1 - 48 55 = a1

  5. Warm - Up Copy and complete in your Warm-up section. Write the explicit formula: a9= 7 a20 = -59 Finally, use a1 and d to write and simplify explicit formula: an = a1 + d(n - 1) an = 55 - 6(n - 1) an = 55 - 6n + 6 an = - 6n + 61

  6. Arithmetic Sequences Teachers click here for the Desmos Activity.

  7. New Concepts Topic: Arithmetic Sequences Quizizz: Arithmetic Sequences KAHOOT Arithmetic Sequences

  8. Arithmetic Sequences Arithmetic Sequences Video (stop video at 7:00)

  9. Arithmetic Sequences Quiz Review Suggestions

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