ከ«የጆሜትሪክ ድርድር» ለውጦች መካከል ያለው ልዩነት

* {{cite web|last=Peppard|first=Kim|title=College Algebra Tutorial on Geometric Sequences and Series|url=http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut54d_geom.htm|publisher=West Texas A&M University}}

* {{cite web|last=Casselman|first=Bill|title=A Geometric Interpretation of the Geometric Series|format=Applet|url=http://merganser.math.gvsu.edu/calculus/summation/geometric.html}}

 

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