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anonymous

  • one year ago

Janet said that the common difference in the sequence below is -2. Is she correct? Justify your answer using complete sentences and proper grammar. 1, -2, 4, -8....

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  1. freckles
    • one year ago
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    well what are the following equal to term-previous term: -2-1= 4-(-2)= -8-4=

  2. freckles
    • one year ago
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    if they are all the same number then the sequence does have a common difference and whatever number that is is the common difference

  3. anonymous
    • one year ago
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    So yeah

  4. freckles
    • one year ago
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    did you actually perform the differences above?

  5. anonymous
    • one year ago
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    yes .

  6. freckles
    • one year ago
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    -2-1=? 4-(-2)=? -8-4=?

  7. freckles
    • one year ago
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    so you got each one of those is -2?

  8. anonymous
    • one year ago
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    No

  9. freckles
    • one year ago
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    right the answer is no the sequence doesn't have a common difference because -2-1 is not the same as 4-(-2) or the same as -8-4

  10. anonymous
    • one year ago
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    but i thought because when multiplied by -2 idk i thought multiplying made sense

  11. freckles
    • one year ago
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    common difference assumes you have an arithemetic sequence and we don't

  12. anonymous
    • one year ago
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    ooohhhhhhhhh

  13. freckles
    • one year ago
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    common ratio assumes we have a geometric sequence which we do

  14. freckles
    • one year ago
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    the word that makes the whole thing false is the difference word

  15. freckles
    • one year ago
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    if they said common ratio then it would have been true

  16. anonymous
    • one year ago
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    ohh , thank you so much .

  17. freckles
    • one year ago
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    since term/previous term =-2 that is -2/1=4/-2=-8/4=-2

  18. freckles
    • one year ago
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    and np

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