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8 votes
8 votes
Solve the formula for a

Solve the formula for a-example-1
User Oarfish
by
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2 Answers

19 votes
19 votes


\\ \tt\longmapsto S=(a(1-r^n))/(1-r)

  • Use cross multiplication


\\ \tt\longmapsto S(1-r)=a(1-r^n)


\\ \tt\longmapsto a=(S(1-r))/(1-r^n)

User Nur
by
2.5k points
12 votes
12 votes

Answer:

Given formula:


  • S = a(1-r^n)/(1-r)

Solving for a:


  • S(1-r) = a(1-r^n)

  • a = S(1-r)/(1-r^n)
User Rudism
by
3.0k points