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ridgeboy36 Group Title

What is the sum of the geometric -4, 24, -144,... if there are 7 terms? Answers to choose from. a)-411,772 b)308,829 c)-159,964 d)119,973

  • 2 years ago
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  1. ridgeboy36 Group Title
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    @sauravshakya

    • 2 years ago
  2. ridgeboy36 Group Title
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    @T-Wrx

    • 2 years ago
  3. ridgeboy36 Group Title
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    @Spectrum

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  4. ridgeboy36 Group Title
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    @sauravshakya can you help me please

    • 2 years ago
  5. sauravshakya Group Title
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    There first term is -4 and common ratio is 24/(-4) =-6 Now, Sn = a(r^n -1)/(r-1)

    • 2 years ago
  6. sauravshakya Group Title
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    Does it help?

    • 2 years ago
  7. ridgeboy36 Group Title
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    yes

    • 2 years ago
  8. sauravshakya Group Title
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    so, what did u get?

    • 2 years ago
  9. ridgeboy36 Group Title
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    i got -159,964

    • 2 years ago
  10. ridgeboy36 Group Title
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    is this correct @sauravshakya ?

    • 2 years ago
  11. sauravshakya Group Title
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    very correct

    • 2 years ago
  12. ridgeboy36 Group Title
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    thank you

    • 2 years ago
  13. sauravshakya Group Title
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    welcome

    • 2 years ago
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