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Math Help - Maclaurin expansions

  1. #1
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    Maclaurin expansions

    Use series multiplication to find a formula for in these Maclaurin expansions. In what circle is each series valid?
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  2. #2
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    Quote Originally Posted by lacy1104 View Post
    Use series multiplication to find a formula for in these Maclaurin expansions. In what circle is each series valid?
    The series for \cosh(z) converges for all z \in \mathbb{C} , and that for \frac{1}{1-z} converges for |z|<1

    RonL
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