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anonymous

  • one year ago

Please help!

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  1. anonymous
    • one year ago
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    what can /\TLAS can do for you?

  2. anonymous
    • one year ago
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    What is the 20th term in the sequence that begins -2, 4, -8, 16...

  3. anonymous
    • one year ago
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  4. anonymous
    • one year ago
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    I know its multiplying by -2

  5. anonymous
    • one year ago
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    it is a gp sereis

  6. anonymous
    • one year ago
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    1st term is -2 2nd term is 4 . . . in this way nth term is (-1)^n*(2)^n so 20th term is (-1)^20*(2)^20

  7. anonymous
    • one year ago
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    so its D?

  8. anonymous
    • one year ago
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    @sourav_aich where did you get the -1 and the 2?

  9. anonymous
    • one year ago
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    you see each alternate term has negative in front of it and 2 is the common ratio

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spraguer (Moderator)
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