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Sagot :
Answer:
Given formula:
- [tex]S = a(1-r^n)/(1-r)[/tex]
Solving for a:
- [tex]S(1-r) = a(1-r^n)[/tex]
- [tex]a = S(1-r)/(1-r^n)[/tex]
[tex]\\ \tt\longmapsto S=\dfrac{a(1-r^n)}{1-r}[/tex]
- Use cross multiplication
[tex]\\ \tt\longmapsto S(1-r)=a(1-r^n)[/tex]
[tex]\\ \tt\longmapsto a=\dfrac{S(1-r)}{1-r^n}[/tex]
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