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Baris 1: [[Berkas:Blue ball.png\|thumb\|Bola Dalam Matematika bukan dalam Geometri]] Dalam [[matematika]], '''Bola''' adalah ruang yang dibatasi oleh volume bola tersebut yang disebut juga bola padat.<ref>[{{Cite book\|last=Japan\|first=Mathematical Society of\|last2=Sūgakkai\|first2=Nihon\|date=1993\|url=https://books.google.com.br/books?id=WHjO9K6xEm4C&lpg=PA555&ots=wdYXw-tmOy&dq=great%20circle%20great%20disk%20ball&pg=PA555#v=onepage&q=great%20circle%20great%20disk%20ball&f=false]\|title=Encyclopedic Dictionary of Mathematics\|publisher=MIT Press\|isbn=978-0-262-59020-4\|language=en}}</ref> Bisa berupa bola tertutup (termasuk titik batas yang membentuk bola) atau bola terbuka (tidak termasuk mereka). == Dalam Ruang Eucliden == Baris 10: <!--The {{mvar\|n}}-dimensional volume of a Euclidean ball of radius {{mvar\|R}} in {{mvar\|n}}-dimensional Euclidean space is:--><ref>Equation 5.19.4, ''NIST Digital Library of Mathematical Functions.'' http://dlmf.nist.gov/,{{dead link\|date=July 2016 \|bot=InternetArchiveBot \|fix-attempted=yes }} Release 1.0.6 of 2013-05-06.</ref> :<math>V_n(R) = \frac{\pi^\frac{n}{2}}{\Gamma\left(\frac{n}{2} + 1\right)}R^n,</math> <!--where~~ ~~ {{math\|Γ}} is [[Leonhard Euler]]'s [[gamma function]] (which can be thought of as an extension of the [[factorial]] function to fractional arguments). Using explicit formulas for [[particular values of the gamma function]] at the integers and half integers gives formulas for the volume of a Euclidean ball that do not require an evaluation of the gamma function. These are:--> :<math>\begin{align}V_{2k}(R) &= \frac{\pi^k}{k!}R^{2k}\,,\\ V_{2k+1}(R) &= \frac{2^{k+1}\pi^k}{(2k+1)!!}R^{2k+1} = \frac{2(k!)(4\pi)^k}{(2k+1)!}R^{2k+1}\,.\end{align}</math> Baris 16: == Lihat pula == * [[Bola]] - dalam pengertian biasa ~~<br>~~ * [[~~Bola~~Cakram (matematika)]] * [[Disk (matematika)]] * [[Bola formal]] * [[Lingkungan (matematika)]] Baris 26 ⟶ 25: * [[Volume HiperBola]] * [[Oktahedron]] * [[Ruang ~~Euclidean~~Euklides]] <br />

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