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sammy90210

  • 3 years ago

Find an explicit rule for the nth term of the sequence. -5, -25, -125, -625, ...

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  1. sammy90210
    • 3 years ago
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    an = -5 • 5n an = 5 • -5n + 1 an = 5 • -5n an = -5 • 5n - 1

  2. AravindG
    • 3 years ago
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    this is a geometric progression with a=-5 r=5 cant u proceed from there?

  3. sammy90210
    • 3 years ago
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    no, i have no idea how to do this type of problem :( @AravindG

  4. AravindG
    • 3 years ago
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    nth term of gp=ar^n-1 here -5(5)^(n-1)

  5. sammy90210
    • 3 years ago
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    so the last option?

  6. sammy90210
    • 3 years ago
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    @AravindG

  7. AravindG
    • 3 years ago
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    yep

  8. sammy90210
    • 3 years ago
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    thank you :)

  9. sammy90210
    • 3 years ago
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    what about Find an explicit rule for the nth term of the sequence. 9, 36, 144, 576, ... an = 9 • 4n - 1 an = 4 • 9n - 1 an = 9 • 4n an = 9 • 4n + 1

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