Multiple Choice Question (MCQ)

If a_n=\dfrac{(-1)^n}{2n-1}, a_n=

  1. ×

    \dfrac{1}{2}

  2. ×

    \dfrac{1}{5}

  3. \dfrac{1}{7}

  4. ×

    \dfrac{1}{9}

Collected in the board: Sequence & Series

Steven Zheng posted 4 months ago

Answer

  1. When n=4

    a_n=\dfrac{(-1)^4}{2\times 4 -1}

    =\dfrac{1}{7}

Steven Zheng posted 4 months ago

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