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snickerzzz Group Title

how do you find the sum of the series sigma n=0 ; 4 (cosn*pi) (3/4)^n

  • one year ago
  • one year ago

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  1. RONNCC Group Title
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    use the equation maker

    • one year ago
  2. snickerzzz Group Title
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    \[\sum_{n=0}^{\infty} 4 (\cos n \pi) (\frac{ 3 }{ 4 })^{n}\]

    • one year ago
  3. RONNCC Group Title
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    are you sure it is till infinity?

    • one year ago
  4. snickerzzz Group Title
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    yes

    • one year ago
  5. TuringTest Group Title
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    Perhaps you can use some trig identities in conjunction with the ratio test.

    • one year ago
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