Formula:13

Digital Library of Mathematical Functions ID 1.2.E11

${\displaystyle{\displaystyle a+ax+ax^{2}+\dots+ax^{n-1}=\frac{a(1-x^{n})}{1-x},}}$

Constraint(s)

${\displaystyle{\displaystyle x\not=1}}$

Symbols List

• ${\displaystyle{\displaystyle n}}$: nonnegative integer
 

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