SOLUTION: Sn=(rn-1)/r-1 make A the subject of formula?

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Question 1114530: Sn=(rn-1)/r-1 make A the subject of formula?
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
As posted, it MAKES NO SENSE,

because A is not a member of the formula.


Do you understand well the meaning of what you are writing/posting ? ? ?