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summation 音标拼音: [səm'eʃən] n. 总和,和,合计 总和,和,合计 summation总和 求和 summation n 1: a concluding summary ( as in presenting a case before a law court) [ synonym: { summation}, { summing up}, { rundown}] 2: ( physiology) the process whereby multiple stimuli can produce a response ( in a muscle or nerve or other part) that one stimulus alone does not produce 3: the final aggregate; " the sum of all our troubles did not equal the misery they suffered" [ synonym: { sum}, { summation}, { sum total}] 4: the arithmetic operation of summing; calculating the sum of two or more numbers; " the summation of four and three gives seven"; " four plus three equals seven" [ synonym: { summation}, { addition}, { plus}] Summation \ Sum* ma" tion\, n. [ Cf. F. sommation. See { Sum}, v. t.] The act of summing, or forming a sum, or total amount; also, an aggregate. [ 1913 Webster] Of this series no summation is possible to a finite intellect. -- De Quincey. [ 1913 Webster] 77 Moby Thesaurus words for " summation": abbreviation, abridgment, abstract, account, accounts, addend, aggregate, amount, apocope, argument, body count, box score, capitulation, cast, census, compression, condensation, conspectus, core, count, curtailment, difference, elision, ellipsis, epitome, essence, evidence, foreshortening, gist, head count, inventory, main point, meat, nose count, number, pith, plus, plus sign, precis, product, quantity, recap, recapitulation, reckoning, recount, recounting, reduction, rehearsal, repertory, resume, retrenchment, run- through, rundown, score, shortening, statement, substance, subtotal, sum, sum and substance, summary, summing, summing up, summing- up, syncope, synopsis, tale, tally, telescoping, testimony, the bottom line, the story, the whole story, total, truncation, whole, x number
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- summation - The idea behind the sum of powers of 2 - Mathematics Stack . . .
I know that the sum of powers of $2$ is $2^{n+1}-1$, and I know the mathematical induction proof But does anyone know how $2^{n+1}-1$ comes up in the first place For example, sum of n numbers is
- summation - How to prove a formula for the sum of powers of $2$ by . . .
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- summation - Sum of odd numbers always gives a perfect square . . .
Explore related questions elementary-number-theory summation See similar questions with these tags
- summation - Intuition behind the formula for $\sum_ {i=1}^n i^ {2 . . .
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- summation - How to convert Sigma Notation to a regular formula . . .
$\\sum_{i=1}^n i$ is the same as $\\frac{n(n+1)}{2}$ Can someone explain how the sigma notation is converted to this? I'm trying to figure out if there's a way to convert $\\sum_{i=1}^n i+(x-1)$
- algebra precalculus - Rules for Product and Summation Notation . . .
Rules for Product and Summation Notation Ask Question Asked 12 years ago Modified 6 years, 1 month ago
- summation - How to get to the formula for the sum of squares of first n . . .
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- How can we sum up $\sin$ and $\cos$ series when the angles are in . . .
How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression? For example here is the sum of $\cos$ series: $$\sum_ {k=0}^ {n-1}\cos (a+k \cdot d) =\frac {\sin (n \times \f
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