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Series (mathematics) - Wikipedia, the free encyclopedia
In mathematics, given an infinite sequence of numbers { a n }, a series is informally the result of adding all those terms together: a 1 + a 2 + a 3 + · · ·. These can...
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Geometric series - Wikipedia, the free encyclopedia
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Infinite series. An infinite series is an expression like this: S = 1 + 1/2 + 1/4 + 1/8 + ... The dots mean that infinitely many terms follow. ...
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Infinite series occupy a central and important place in mathematics. C. J. Sangwin shows us how eighteenth-century mathematician Leonhard Euler solved one of the foremost infinite series problems of his day. ... is known as an infinite series. Such series appear in many areas of modern mathematics. Much of this topic...
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In this tutorial, we review some of the most common tests for the convergence of an infinite series $$ \sum_{k=0}^{\infty} a_k = a_0 + a_1 + a_2 + \cdots $$ The proofs or these tests are interesting, so we urge you to look them up in your calculus text.
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We say that an infinite series with a sum converges. Some series don't converge, like 1 + 1/2 + 1/3 + 1/4 + ..., the harmonic series.. To see that the partial sums go off to infinity, note that we have 1 and 1/2 and then ;
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+ 1/2 n + ..., which is defined and equal to 2. When the sum of an infinite series is finite and definable, then that series and its corresponding seqeuence converge. Otherwise, the series and its corresponding sequence diverge.
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