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Math Help - Sum of numbers 2^1 + 2^2 ... 2^n

  1. #1
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    Sum of numbers 2^1 + 2^2 ... 2^n

    What's the forumula for the sum of numbers 2^1 + 2^2 ... 2^n?

    Any general forumla for the sum of power of integers

    p^1 + p^2 ... p^n?
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  2. #2
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    Quote Originally Posted by squelchy451 View Post
    What's the forumula for the sum of numbers 2^1 + 2^2 ... 2^n?

    Any general forumla for the sum of power of integers

    p^1 + p^2 ... p^n?
    Review geometric series: Geometric series - Wikipedia, the free encyclopedia
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    Quote Originally Posted by squelchy451 View Post
    What's the forumula for the sum of numbers 2^1 + 2^2 ... 2^n?
    In addition to what mr fantastic wrote, you can view this in base 2.

    For example, n=5 gives 111110_2. This is two less than 1000000_2. So...
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