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Math Help - Quick series question..

  1. #1
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    Quick series question..

    If you have: (1/4)(1/1+(x-1)) would this be true: a=1 and r=-4(x-1) ?
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  2. #2
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    Quote Originally Posted by helpplz View Post
    If you have: (1/4)(1/1+(x-1)) would this be true: a=1 and r=-4(x-1) ?
    not quite ...

    \frac{1}{4} \cdot \frac{1}{1 - (1-x)} = \frac{1}{4} \left[1 + (1-x) + (1-x)^2 + ... \right]

    ... with the restriction |1-x| < 1
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  3. #3
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    Thanks! And if you used x-1 instead, it would look the same except with alternating signs, right?
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