Bola (geometri): Perbedaan antara revisi

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Dalam batas ketika {{mvar|''approachesr''}} mendekati nol <ref name="delta">{{cite book
|author1=E.J. Borowski |author2=J.M. Borwein |title=Collins Dictionary of Mathematics
|year=1989 |url=https://archive.org/details/dictionaryofmath0000boro |isbn=978-0-00-434347-1|pages=[https://archive.org/details/dictionaryofmath0000boro/page/141 141], 149}}</ref> persamaan ini menjadi:
:<math>V = \int_0^r A(r) \, dr.</math>