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Kris5

  • 3 years ago

Please help...Find the sum of the first six terms of the series: -96,144,-216,324,...

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  1. mathmate
    • 3 years ago
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    The rule is \( a_{n+1} = -1.5 a_n \) with \( a_0=-96 , and r=-1.5 \) The partial sum is \( a_0\frac{1-r^n}{1-r}=(-96)\frac{1-(-1.5)^6}{1-(-1.5)} \)

  2. Kris5
    • 3 years ago
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    oohh okay thank you

  3. Kris5
    • 3 years ago
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    :]

  4. mathmate
    • 3 years ago
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    yw!

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