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Generation of binomial series using calculus : ウィキペディア英語版
Generation of binomial series using calculus

The evaluation of a binomial expression requires extensive calculations. A useful mnemonic to facilitate its evaluation is outlined herein.
The initial term, which consists of a power of the first variable, is differentiated. This expression is then integrated with respect to the second variable. This yields the second term. This process is repeated until the first variable vanishes.
For example, to evaluate (a + b)3, the procedure results in the following:
a3 + 3
*a2
*b + 3
*2
*a
*b2/2 + 3
*2
*1
*b3/2
*3.
Clear of fractions to arrive at:
a3 + 3
*a2
*b + 3
*a
*b2 + b3
To evaluate (b + a)3, the process is the same; this suggests that (a + b)n can be encoded as
anb0 or as bna0.
Category : Algebra



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